nested query

Hello
I'm stuck in a nested query. My table structure is as below.

create table a1 (varchar2 (10) c1, c2 varchar2 (10));
create table a2 (varchar2 (10) c1, c2 varchar2 (10));

and my data

insert into a1 values ('1', 'A11');
insert into a1 values ('2', 'A12');

insert into a2 values ('1', 'A21');
Insert in a2 (c2) values ('A22');

now when I try to extract all records in table A1 with column C1 not in column C1 of table A2 then returning me 0 documents instead of returning the second disc with c1, c2 as '2', 'A12 '.

Can anyone explain why its happening then?

Hello

An explanation for this can be found in the doc below.

[http://download-east.oracle.com/docs/cd/B19306_01/server.102/b14200/conditions013.htm]

If any item in the list that follows a NOT IN operation is null, then all lines are evaluated to FALSE or UNKNOWN, and no row is returned

Concerning
Anurag Tibrewal.

PS: There to learn new things every day.

Tags: Database

Similar Questions

  • Count (*) with the nested query

    Hello
    I have a question about the count (*) with the nested query.

    I have a table T1 with these columns:
    Number of C1
    Number of C2
    Number of C3
    Number of C4
    Number of C5

    (The type of each column is not relevant for example).

    This query:
    Select C1, C2, C3, C4
    from T1
    Group C1, C2

    It is not correct becausa C3 and C4 are the columns specified in the GROUP BY expression.

    If you run this query:
    Select count (*)
    (select C1, C2, C3, C4
    from T1
    Group C1, C2)

    I don't have an error message (properly, the result is the number of records).

    Why?

    Thank you.

    Best regards
    Luca

    because the optimizer rewrites as

    SELECT     COUNT(*)
              FROM   T1
          GROUP BY   C1, C2

    G.

    Edited by: g. March 1, 2011 09:19

  • performance for this convoluted nested query

    Hello

    I wonder about the performance of this convoluted nested query:

    Select t.parentId from TreeParentChild t
    where t.childId =: childId and t.childOwnerId in)
    Select tt.parentOwnerId in the TreeParentOwner tt
    where t.parentId = tt.parentId
    )

    There are two tables of interest. The first establishes parent-child relationships,
    and includes the id of the owner of the 'child', which always has exactly one owner.

    table TreeParentChild
    ---------------------
    long parentId
    long childId
    long childOwnerId

    The other table lists of owners for the 'parents' who gave
    parentId can have several owners mapped into multiple lines

    table TreeParentOwner
    ---------------------
    long parentId
    long parentOwnerId

    And the purpose of the above query is to get all the parentids for a given childid
    who have an owner mapping said that the parentid has an owner that is
    the owner of the child.

    This query makes sense to me, but I wonder about his performance, because a column
    external selection corresponds to a column in the internal selection. What is - c
    also called nested request type?

    Andy

    Hi, Andy.

    If you are interested in the jargon, a join where you not actually select anything from one of the tables is called a join semi .

    user9990110 wrote:
    ... It must also pin to a childId data so I've rewritten as:

    SELECT     t.parentId
FROM     TreeParentChild t
WHERE     t.childId = :childId AND (t.parentId, t.childOwnerId) IN
     (
          SELECT     tt.parentId, tt.parentOwnerId
          FROM     TreeParentOwner tt
     )
;

    Is this correct?

    Oops! I forgot this condition: it takes only!
    Yes, your correction is correct.

    And what you would like the clues in this case for 2 tables for better performance?

    Similarly, what would you as clues to the two tables for better performance in the case of the solution to join internal you gave?

    For each query, you can use a composite index on t (parentId, childOwnerId) and an index composed on tt (parentId, parentOwnerId).

    There is yet another way to do what you want: an EXISTS subquery.

    SELECT     t.parentId
FROM     TreeParentChild          t
WHERE     t.childId = :childId
AND      EXISTS
     (
          SELECT     0
          FROM     TreeParentOwner tt
          WHERE     tt.parentId       = t.parentId
          AND     tt.parentOwnerId  = t.childOwnerId
     )
;

    With rare exceptions, EXISTS subqueries are always correlated.

    I suspect that the best way to this is the first way I posted, using a join.

  • Identifier not valid several nesting query

    For the life of me I can't understand why I am getting an error on the first line (in bold) - something is wrong with my nesting, but I can't understand that. It is an invalid identifier on 'CLIENT' error in line 1 has something to do with my nesting I think. Any help?

    Select * from (select cust. ) Region_ID of

    (select cust_nbr from)

    (select region_id,

    Sum (tot_sales) tot_sales the Group of commands by region_id) reg

    Join

    (select sum (tot_sales) tot_sales, region_id,

    cust_nbr of the order of cust_nbr group, region_id) cust

    on cust.region_id = reg.region_id

    where cust.tot_sales > reg.tot_sales *. 2)) ca

    inner join customer c

    We ca.cust_nbr = c.cust_nbr;

    2776946 wrote:

    I'll edit the select * part so the global query can be likened to an analytic function, but the moment I can't get why my request is not read the alias 'CUST '...

    You must take into account the scope of alias variables

    They are valid from the outside to the inside; not inside out like you trying

  • Subselect query returns "invalid identifier", but the nested query return lines

    I don't think it's a general SQL question.

    Select * from persons where person_id in)

    Select person_id with people whose name = 'Obama' - subquery

    ) and age > 18;

    When I run the subquery, I get:

    ORA-00904: "PERSON_ID": invalid identifier

    00904, 00000 - '% s: invalid identifier '.

    * Cause:

    * Action:

    Error on line: column 5: 8

    This is because the table people do not have the person_id field.

    But when I run the nested together query it returns all the lines in people with the AGE greater than 18.

    How is he succeeds when the subquery is obviously wrong?

    363f652b-263D-4418-933F-74a1d0a41b4c wrote:

    I don't think it's a general SQL question.

    Select * from persons where person_id in)

    Select person_id with people whose name = 'Obama' - subquery

    ) and age > 18;

    When I run the subquery, I get:

    ORA-00904: "PERSON_ID": invalid identifier

    00904, 00000 - '% s: invalid identifier '.

    * Cause:

    * Action:

    Error on line: column 5: 8

    This is because the table people do not have the person_id field.

    But when I run the nested together query it returns all the lines in people with the AGE greater than 18.

    How is he succeeds when the subquery is obviously wrong?

    Yes - this is a general SQL question and ask often enough.

    Correlated subqueries depend on the inner query, be able to see and access to the columns of the outer query. Normally see you referenced in the WHERE clause of the subquery and not in the SELECT clause, but the reference is valid in both places. This works because the columns of the tables in the main query are accessible in the subquery. "Person_id" is probably a column in the table 'people '.

    Which can be a cause of problems 'odd' when the column (in your case "person_id") is more of a table.

    Use an alias in the subquery in the subquery and you will find that it will not succeed.

    See these two articles AskTom where he addresses this specific issue

    http://asktom.Oracle.com/pls/Apex/f?p=100:11:0:P11_QUESTION_ID:3317493900346468494

    http://asktom.Oracle.com/pls/Apex/f?p=100:11:0:P11_QUESTION_ID:155200640564

  • How to add a xmlelements not nested in a nested query xmlelement

    I have the following query prints in a file xml very well:

    Select xmlroot)
    XmlElement
    (
    EMSData,
    XMLAGG
    (

    XMLELEMENT
    (
    year,
    XmlAttributes (calyear),
    XMLAGG
    (
    XmlElement
    (
    meantime,
    XmlAttributes (intervalType as 'Type', 'Value' ValeurIntervalle),
    XmlElement
    (
    data,
    XmlAttributes (selectType as "Select", supplier, mission, instrument),
    XMLFOREST
    (
    bytes,
    files
    )
    )
    )
    ValeurIntervalle desc order, supplier, mission, orderBy, instrument
    )
    )
    calyear desc order
    )
    (), version '1.0') .getClobVal () in l_xml
    FROM MyTable
    Calyear group;

    The output is:
    <? XML version = "1.0"? >
    < EMSDATA >
    < CALYEAR YEAR = "2011" >
    < Type INTERVAL = 'DAY' Value = "320" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 2750877820501 < / BYTES >
    <>273997 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = '319' >
    < Select DATA = 'SYSTEM' >
    < BYTES > 5155961487454 < / BYTES >
    <>378457 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "318" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4606818769422 < / BYTES >
    <>420231 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "317" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 3686199358862 < / BYTES >
    <>399271 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = '316' >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4989867970498 < / BYTES >
    <>406249 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "315" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4027315556027 < / BYTES >
    <>463319 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "314" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4893244762669 < / BYTES >
    <>600252 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < / YEAR >
    < / EMSDATA >

    What I have to do is to add a few items just above the nested element under < YEAR >, i.e.:

    <? XML version = "1.0"? >
    < EMSDATA >
    < DailyStartDate > 28 November 11 < / DailyStartDate >
    < WeeklyStartDate > 29 - SEP - 11 < / WeeklyStartDate >
    < MonthlyStartDate > 1 October 01 < / MonthlyStartDate >
    < CALYEAR YEAR = "2011" >
    < Type INTERVAL = 'DAY' Value = "320" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 2750877820501 < / BYTES >
    <>273997 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = '319' >
    < Select DATA = 'SYSTEM' >
    < BYTES > 5155961487454 < / BYTES >
    <>378457 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "318" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4606818769422 < / BYTES >
    <>420231 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "317" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 3686199358862 < / BYTES >
    <>399271 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = '316' >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4989867970498 < / BYTES >
    <>406249 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "315" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4027315556027 < / BYTES >
    <>463319 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < Type INTERVAL = 'DAY' Value = "314" >
    < Select DATA = 'SYSTEM' >
    < BYTES > 4893244762669 < / BYTES >
    <>600252 FILES < / FILES >
    < / DATA >
    < / INTERVAL >
    < / YEAR >
    < / EMSDATA >

    I can select these separate items of data in the table or I can add them to the XML through a local variable. I tried several ways to add this to my above query but am stuck. If I bring to the table, the field names are dailyStartDate, weeklyStartDate and monthlyStartDate. Again, I only want the distinct values and therefore something for everyone in this XML file rather than enumerate over and over again in the XML.

    Please notify.

    Best,
    NAT

    If you already have the values in variables, why not just do that?

    select xmlroot(
 xmlelement
 (
  EMSData,
  XMLForest(
   v_DailyStartDate as "DailyStartDate",
   v_WeeklyStartDate as "WeeklyStartDate",
   v_MonthlyStartDate as "MonthlyStartDate"
  ),
  XMLAGG
  (
   XMLELEMENT
   (
    year,

  • Nested query loop

    I have a question I want to loop through the data and the display. The query is an inner join with a table being the order numbers and the second being more details on each order. They are joined by the order number. I want to do is loop through the data and all the details in the order number of the group. I tried many configurations of nesting, and I had no chance. That's what I'd like to see.

    Number 1
    Point 1
    Point 2
    Point 3

    Order number 2
    Point 1
    Point 2

    Order number 3
    point 1
    Point 2
    Point 3
    Point 4

    Any recommendations?


    Thank you guys! I had tried this approach, but apparently I was doing something wrong before. I had received nesting cfoutput errors and then I got lost in a mess of formatting. Thanks again for the direction.

  • nested query sup

    Hello
    How to write ro nested several rows (row should be composed of a range of values) query sub between the tables if they have no common column.
    Based on this range of weight that I consolidate other columns.

    For example:
    My table should contain

    weight range:
    -------------------
    1 > 2
    2 > 3
    3 > 4
    .
    .
    .
    etc.

    Please repost your question adding clarity and an example so that we can understand what you're asking. Also include your full version number.

    SELECT * FROM v$version;

  • the system passed variable is unable to execute the nested query

    {color: #0000ff} list = text_table.txt



    Cat $liste | all read LINE {color}



    do



    sqlplus-silent szubair/ssz12345 & lt; & lt; EOF & gt; / dev/null 2 & gt; & 1



    set LINE = $LINE



    set pagesize 0 feedback off check out of position off echo off;



    Set serveroutput size 2000;



    ARRAYSIZE Set 3;



    fixed lines 2000;



    Set colsep @ | @ ;



    game of garnish trims



    coil /tmp/SQL.txt;



    Select 'trim('|| column_name ||'),' all_tab_columns where table_name = '& LINE ";



    spool off;



    coil $LINE;



    {color:#ff0000}@sql1.sql & lt;-this request does not accept the $LINE..} Please see in the blue text)



    spool {color}



    output



    EXPRESSIONS OF FOLKLORE



    fact











    ========= SQL1.sql --------------------------------------------------



    Select / * + parallel ALL_ROWS (16) * / trim (IHOSRSUC), trim (PMM_DATETIME), trim (SWITCH_NAME), trim (BSC).



    Trim (indicated), Trim (Sector), Trim (IHO2GATT), Trim (IHO2GSUC), Trim (IHO2GFAL), Trim (IHO2GBLK), Trim (IHO2GREL),



    Trim (IHO2GINT), Trim (IHO3VATT), Trim (IHO3VSUC), Trim (IHO3VFAL), Trim (IHO3VBLK), Trim (IHO3VREL), Trim (IHO3VINT),



    Trim (IHO3DATT), Trim (IHO3DSUC), Trim (IHO3DFAL), Trim (IHO3DBLK), Trim (IHO3DREL), Trim (IHO3DINT), Trim (IHOSPR02),



    Trim (IHOSPR01), Trim (HDROP_INTERC_2V), Trim (HDROP_INTERC_3V), Trim (REC_RELIABILITY_IND), Trim (PART_MAP),



    Trim (PMM_DATESTAMP), Trim (IHOSOCHG)



    a {color: #ff0000} $LINE {color}



    where to_char(PMM_DATESTAMP,'YYYY-MM-DD')=to_char(sysdate-1,'YYYY-MM-DD') and rec_reliability_ind = 1;







    {color: #ff0000} ERROR MESSAGE







    of pmmcounter_db. $LINE



    *



    ERROR on line 7:



    ORA-00911: invalid character



    {color}







    any thoughts?



    {color}

    Published by: shakil_zubair on October 28, 2008 12:38 AM

    >

    I guess that SQL * more is Inline script after the shell has replaced all occurrences of variables, therefore, you might want to try an (untested) approach like this:

    list=text_table.txt
cat $list | while read LINE
do
sqlplus -silent szubair/ssz12345 < /dev/null 2>&1
define LINE=$LINE
set pagesize 0 feedback off verify off heading off echo off
set serveroutput on size 2000
set arraysize 3
set lines 2000
set colsep @|@
set trim on trims on
spool sql.txt

select 'trim('||column_name||'),' from all_tab_columns where table_name='&LINE';

spool off

spool temp.txt
select '$LINE' from dual;
# if you need to have the object name qualified you need to add it like that
# select 'owner.$LINE' from dual;
spool off

spool $LINE

@sql1.sql

spool off
exit
EOF
done

-- SQL1.SQL:

select /*+ ALL_ROWS parallel(16)*/
@@sql.txt
from
@@temp.txt
where to_char(PMM_DATESTAMP,'YYYY-MM-DD')=to_char(sysdate-1,'YYYY-MM-DD')
and rec_reliability_ind=1;

    Moreover, it is a good idea to post your password here in the forum.

    Kind regards
    Randolf

    Oracle related blog stuff:
    http://Oracle-Randolf.blogspot.com/

    SQLTools ++ for Oracle (Open source Oracle GUI for Windows):
    http://www.sqltools-plusplus.org:7676 /.
    http://sourceforge.NET/projects/SQLT-pp/

    Published by: Randolf Geist on October 28, 2008 14:10

    security warning

  • Nested queries

    I have this nested queryy but technology does not produce results as it should. The nested query works fine because I've alerted the values on, but I can't get the nested values to be written in the html code. Here is the code:

     tx.executeSql("select eventdate,strftime('%m',eventdate) as month, strftime('%Y',eventdate) as year from news where flag in ('E','A') and eventdate > '2011-7-6' group by date(eventdate,'start of month','+1 month','-1 day') having eventdate is not null order by date(eventdate,'start of month','+1 month','-1 day')", [],

                  function(tx,rs){
                   if(rs.rows.length > 0){
                       for(var i=0;i';

                            //alert(row.month+" "+row.year)

                            tx.executeSql("select subject,strftime('%m',eventdate) as month, strftime('%w',eventdate) as day from news where strftime('%m',eventdate) = strftime('%m','"+row.eventdate+"') and strftime('%Y',eventdate) = strftime('%Y','"+row.eventdate+"') and flag in ('E','A') order by eventdate", [],

                                function(tx,rs2){
                                //alert(rs2.rows.length);   

                                     for(var p=0;p'+row2.subject+'' ;
                                     }

                                }
                                , app.onError);

                            }

                       }//end for loop*/

                     showresultDiv.innerHTML += contentDiv+'';
                   }

                  }

                 , app.onError);

    Please can anyone help with this.

    Realizing the nature of the html5 application I decide not not my app like that. I made sure, after the main title are built I use an OnClick event to call a function that forwards the relevant data for me to make a dropdown menu with all the values that I needed to be out all at once on the charge.

  • Why is query on Table XMLTYPE ACME_CUST do a full Table Scan?

    Our Oracle 11 g Enterprise Edition Release 11.2.0.1.0 database, there is a query against a record in 25 214 table XMLTYPE ACME_CUST.
    SELECT rownum   AS seq,
      EID  AS eid,
      SUBSTR(CUST_ID, 1, INSTR(CUST_ID, '|')-1) AS tgt_acme_customer_id,
      SUBSTR(CUST_ID, INSTR(CUST_ID, '|')   +1) AS src_acme_customer_id_list
    FROM
      (SELECT ac.eid EID,
        listagg(ac.acme_cust_id, '|') WITHIN GROUP (
      ORDER BY ac.acme_cust_id, ac.acme_cust_id) CUST_ID
      FROM ACME_CUST ac
      GROUP BY ac.eid
      HAVING COUNT(ac.acme_cust_id)>1)
    Explain the plan indicates:

    SELECT statement
    County
    VIEW
    FILTER
    Filter predicates
    Count (*) > 1
    GROUP SORT BY
    ACME_CUST FOR FULL TABLE

    The ACME_CUST Table has a virtual column defined on acme_cust_id as well as a corresponding index. He filed is also defined as the primary key.

    Here is the table reflect and associated States:
    CREATE
  TABLE "N98991"."ACME_CUST" OF XMLTYPE
  (
    CONSTRAINT "ACME_CUST_ID_PK" PRIMARY KEY ("ACME_CUST_ID") USING INDEX
    PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE(INITIAL 65536
    NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1
    FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE
    DEFAULT) TABLESPACE "ACME_DEV" ENABLE
  )
  XMLTYPE STORE AS SECUREFILE BINARY XML
  (
    TABLESPACE "ACME_DEV" ENABLE STORAGE IN ROW CHUNK 8192 CACHE READS LOGGING
    NOCOMPRESS KEEP_DUPLICATES STORAGE(INITIAL 106496 NEXT 1048576 MINEXTENTS 1
    MAXEXTENTS 2147483645 PCTINCREASE 0 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT
    CELL_FLASH_CACHE DEFAULT)
  )
  ALLOW NONSCHEMA ALLOW ANYSCHEMA VIRTUAL COLUMNS
  (
    "EID" AS (CAST(SYS_XQ_UPKXML2SQL(SYS_XQEXVAL(XMLQUERY(
    'declare default element namespace "http://www.cigna.com/acme/domains/customer/customerprofile/2011/11"; (::)                               
/customerProfile/@eid'
    PASSING BY VALUE SYS_MAKEXML(128,"XMLDATA") RETURNING CONTENT ),0,0,
    16777216,0),50,1,2) AS VARCHAR2(15))),
  *bold*  "ACME_CUST_ID" AS (CAST(SYS_XQ_UPKXML2SQL(SYS_XQEXVAL(XMLQUERY(
    'declare default element namespace "http://www.cigna.com/acme/domains/customer/customerprofile/2011/11"; (::)                               
/customerProfile/@id' *bold*
    PASSING BY VALUE SYS_MAKEXML(128,"XMLDATA") RETURNING CONTENT ),0,0,
    16777216,0),50,1,2) AS VARCHAR2(50))),
    "CRET_DT" AS (SYS_EXTRACT_UTC(CAST(TO_TIMESTAMP_TZ(SYS_XQ_UPKXML2SQL(
    SYS_XQEXVAL(XMLQUERY(
    'declare default element namespace "http://www.cigna.com/acme/domains/customer/customerprofile/2011/11"; (::)                                                                                                       
/customerProfile/@create_dt'
    PASSING BY VALUE SYS_MAKEXML(128,"XMLDATA") RETURNING CONTENT ),0,0,
    16777216,0),50,1,2),'SYYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM') AS TIMESTAMP
WITH
  TIME ZONE)))
  )
  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE
  (
    INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0
    FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT
    CELL_FLASH_CACHE DEFAULT
  )
  TABLESPACE "ACME_DEV" ;
CREATE
  INDEX "N98991"."ACME_CST_CRET_DT_IDX" ON "N98991"."ACME_CUST"
  (
    "CRET_DT"
  )
  PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE
  (
    INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0
    FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT
    CELL_FLASH_CACHE DEFAULT
  )
  TABLESPACE "ACME_DEV" ;
CREATE
  INDEX "N98991"."ACME_CST_EID_IDX" ON "N98991"."ACME_CUST"
  (
    "EID"
  )
  PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE
  (
    INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0
    FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT
    CELL_FLASH_CACHE DEFAULT
  )
  TABLESPACE "ACME_DEV" ;
*bold*CREATE UNIQUE INDEX "N98991"."ACME_CUST_ID_PK" ON "N98991"."ACME_CUST"
  (
    "ACME_CUST_ID"
  )
  PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE *bold*
  (
    INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0
    FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT
    CELL_FLASH_CACHE DEFAULT
  )
  TABLESPACE "ACME_DEV" ;
  CREATE
    INDEX "N98991"."ACME_CUST_XMLINDEX_IX" ON "N98991"."ACME_CUST"
    (
      OBJECT_VALUE
    )
    INDEXTYPE IS "XDB"."XMLINDEX" PARAMETERS
    (
      'XMLTABLE ACME_CUST_IDX_TAB XMLNamespaces (''http://www.cigna.com/acme/domains/commoncontact/2011/11'' as "cm",  default ''http://www.cigna.com/acme/domains/customer/customerprofile/2011/11''),       
''/customerProfile''        
columns       
DOB date  PATH ''personInformation/cm:birthDate'',       
FIRSTNAME varchar2(40)    PATH ''name/cm:givenName'',       
LASTNAME varchar2(40)    PATH ''name/cm:surName'',       
SSN varchar2(30)    PATH ''identifiers/ssn'',       
MEMBERINFOS XMLType path ''memberInfos/memberInfo'' VIRTUAL        
XMLTable acme_cust_lev2_idx_tab XMLNAMESPACES(default ''http://www.cigna.com/acme/domains/customer/customerprofile/2011/11''),       
''/memberInfo'' passing MEMBERINFOS          
columns          
ami varchar2(40) PATH ''ami'',         
subscId varchar2(50) PATH ''clientRelationship/subscriberInformation/subscriberId'',         
employeeId varchar2(50) PATH ''systemKeys/employeeId'',         
clientId varchar2(50) PATH ''clientRelationship/clientId''       
'
    );
CREATE UNIQUE INDEX "N98991"."SYS_C00384339" ON "N98991"."ACME_CUST"
  (
    "SYS_NC_OID$"
  )
  PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS STORAGE
  (
    INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0
    FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT
    CELL_FLASH_CACHE DEFAULT
  )
  TABLESPACE "ACME_DEV" ;
CREATE UNIQUE INDEX "N98991"."SYS_IL0000649948C00003$$" ON "N98991"."ACME_CUST"
  (
    PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE(INITIAL 65536 NEXT 1048576
    MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST
    GROUPS 1 BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)
    TABLESPACE "ACME_DEV" PARALLEL (DEGREE 0 INSTANCES 0) ;
    Why is it not the ACME_CUST_ID_PK a unique index on the column virtual ACME_CUST_ID used in the plan to explain it?

    Any input would be much appreciated, like really puzzled here.

    Kind regards
    Rick

    Hi Richard,

    Event 10053 appears excessive for this situation.

    What is the problem?
    Set the event, run the query, disconnected the event, check the trace file, that's all.

    It is not excessive if it helps you understand what is happening and why an index is of no use in this situation.

    Tried the / * + INDEX_FFS (ACME_CUST_ID_PK) * / hint in the query "nested".

    Don't know what nested query, you reference, so if I misunderstood what you mean, just ignore the comment.
    What you posted earlier, it seems that you talk about this part:

    listagg(ac.acme_cust_id,'|') WITHIN GROUP (
ORDER BY ac.acme_cust_id,ac.acme_cust_id) CUST_ID

    This isn't a nested query, it's a projection. All major works (recovery of lines) has already been done when it comes to this part.

    Maybe just to accept the performance of the queries because it is...

    Maybe you can try something else.

    See the document: Oracle XML DB: best practices, page 15 exodus 8:

    When there are multiple scalar values that must be consolidated or ordered, it is better to write
    with XMLTable build projecting all the columns to be ordered or grouped as shown
    below.

    Close example of your real need:

    Connected to:
Oracle Database 11g Express Edition Release 11.2.0.2.0 - Production

SQL> create table xtab_cols of xmltype
  2  xmltype store as securefile binary xml;

Table created.

SQL> insert /*+ append */ into xtab_cols
  2  select xmlelement("ROW",
  3           xmlforest(
  4            TABLE_NAME, COLUMN_NAME, DATA_TYPE, DATA_TYPE_MOD, DATA_TYPE_OWNER,
  5            DATA_LENGTH, DATA_PRECISION, DATA_SCALE, NULLABLE, COLUMN_ID,
  6            DEFAULT_LENGTH, NUM_DISTINCT, LOW_VALUE, HIGH_VALUE,
  7            DENSITY, NUM_NULLS, NUM_BUCKETS, LAST_ANALYZED, SAMPLE_SIZE,
  8            CHARACTER_SET_NAME, CHAR_COL_DECL_LENGTH,
  9            GLOBAL_STATS, USER_STATS, AVG_COL_LEN, CHAR_LENGTH, CHAR_USED,
 10            V80_FMT_IMAGE, DATA_UPGRADED, HISTOGRAM
 11           )
 12         )
 13  from dba_tab_cols
 14  where owner = 'SYS'
 15  ;

57079 rows created.

SQL> commit;

Commit complete.

SQL> set long 1000
SQL> set pages 100
SQL> select xmlserialize(document object_value) from xtab_cols where rownum = 1;

XMLSERIALIZE(DOCUMENTOBJECT_VALUE)
--------------------------------------------------------------------------------

  ACCESS$
  D_OBJ#
  NUMBER
  22
  N
  1
  7454
  C2083A
  C3031D18
  ,000134156157767642
  0
  1
  2012-01-28
  34794
  YES
  NO
  5
  0
  NO
  YES
  NONE


SQL> exec dbms_stats.gather_table_stats(user, 'XTAB_COLS');

PL/SQL procedure successfully completed.

SQL> set autotrace traceonly
SQL> set timing on
SQL> set lines 120
SQL> select x.table_name
  2       , listagg(x.column_name, ',') within group (order by column_id)
  3  from xtab_cols t
  4     , xmltable('/ROW' passing t.object_value
  5        columns table_name  varchar2(30) path 'TABLE_NAME'
  6              , column_name varchar2(30) path 'COLUMN_NAME'
  7              , column_id   number       path 'COLUMN_ID'
  8       ) x
  9  group by x.table_name
 10  ;

4714 rows selected.

Elapsed: 00:00:08.25

Execution Plan
----------------------------------------------------------
Plan hash value: 602782846

---------------------------------------------------------------------------------
| Id  | Operation           | Name      | Rows  | Bytes | Cost (%CPU)| Time     |
---------------------------------------------------------------------------------
|   0 | SELECT STATEMENT    |           |   466M|   101G|  1580K  (3)| 05:16:04 |
|   1 |  SORT GROUP BY      |           |   466M|   101G|  1580K  (3)| 05:16:04 |
|   2 |   NESTED LOOPS      |           |   466M|   101G|  1552K  (1)| 05:10:32 |
|   3 |    TABLE ACCESS FULL| XTAB_COLS | 57079 |    12M|   408   (1)| 00:00:05 |
|   4 |    XPATH EVALUATION |           |       |       |            |          |
---------------------------------------------------------------------------------

Statistics
----------------------------------------------------------
          9  recursive calls
          1  db block gets
       1713  consistent gets
          0  physical reads
         96  redo size
     773516  bytes sent via SQL*Net to client
       3873  bytes received via SQL*Net from client
        316  SQL*Net roundtrips to/from client
          1  sorts (memory)
          0  sorts (disk)
       4714  rows processed

    And of course, even better after adding an XML index structured (4714 lines read in 1 s):

    SQL> CREATE INDEX xtab_cols_sxi ON xtab_cols (OBJECT_VALUE) INDEXTYPE IS XDB.XMLIndex
  2  PARAMETERS (
  3  q'#XMLTable my_xtab
  4  '/ROW'
  5  columns table_name varchar2(30) path 'TABLE_NAME'
  6        , column_name varchar2(30) path 'COLUMN_NAME'
  7        , column_id number path 'COLUMN_ID' #');

Index created.

Elapsed: 00:00:13.42
SQL> select x.table_name
  2       , listagg(x.column_name, ',') within group (order by column_id)
  3  from xtab_cols t
  4     , xmltable('/ROW' passing t.object_value
  5        columns table_name  varchar2(30) path 'TABLE_NAME'
  6              , column_name varchar2(30) path 'COLUMN_NAME'
  7              , column_id   number       path 'COLUMN_ID'
  8       ) x
  9  group by x.table_name
 10  ;

4714 rows selected.

Elapsed: 00:00:01.00

Execution Plan
----------------------------------------------------------
Plan hash value: 3303494605

------------------------------------------------------------------------------
| Id  | Operation          | Name    | Rows  | Bytes | Cost (%CPU)| Time     |
------------------------------------------------------------------------------
|   0 | SELECT STATEMENT   |         | 57520 |  3201K|   174   (3)| 00:00:03 |
|   1 |  SORT GROUP BY     |         | 57520 |  3201K|   174   (3)| 00:00:03 |
|   2 |   TABLE ACCESS FULL| MY_XTAB | 57520 |  3201K|   171   (1)| 00:00:03 |
------------------------------------------------------------------------------

Note
-----
   - dynamic sampling used for this statement (level=2)

Statistics
----------------------------------------------------------
        297  recursive calls
          1  db block gets
        989  consistent gets
          0  physical reads
        176  redo size
     773516  bytes sent via SQL*Net to client
       3873  bytes received via SQL*Net from client
        316  SQL*Net roundtrips to/from client
         21  sorts (memory)
          0  sorts (disk)
       4714  rows processed

  • SELECT query problem

    Hi all

    Need select records less where Rownum < = 100, a table in which the records are classified by a field in a query, but after stopped in the ordering of rownum gets changes.
     
with t as (select 1 a,'d' b from dual 
union select 8 a,'t' b from dual 
union select 3 a,'u' b from dual 
union select 7 a,'k' b from dual ) 
select t.*,rownum from t order by 2 ;


A B ROWNUM 
1 d 1 
7 k 3 
8 t 4 
3 u 2
    Now I want to select records where ronum < = 2 as below, this can be done by changing only in where clause and do not touch the query select, as can do a nested query I but need to do it by changing only in where clause.
     
A B ROWNUM 
1 d 1 
7 k 3
    Thanks in advance

    Thanks and greetings
    Sanjay

    Published by: Sanjay March 29, 2011 06:26

    Hi, Sanjay

    Sanjay wrote:
    Hi all

    Need select records less where Rownum<= 100,="" from="" a="" table="" in="" which="" records="" are="" ordered="" by="" a="" field="" in="" a="" query="" but="" after="" doing="" order="" by="" the="" rownum="" ordering="" gets="">

    
with t as (select 1 a,'d' b from dual
union select 8 a,'t' b from dual
union select 3 a,'u' b from dual
union select 7 a,'k' b from dual )
select t.*,rownum from t order by 2 ;

A B ROWNUM
1 d 1
7 k 3
8 t 4
3 u 2

    Now I want to select records where ronum<= 2="" like="" below,="" can="" this="" be="" done="" by="" changing="" only="" in="" where="" clause="" and="" not="" touching="" the="" select="" query="" as="" it="" can="" be="" done="" by="" nested="" query="" i="" but="" need="" to="" do="" it="" by="" changing="" only="" in="" where="">

    
A B ROWNUM
1 d 1
7 k 3

    No, there is no way to get these results by changing only the WHERE clause. As it is, you have no column or expression in the main query that indicates how the lines are classified according to b, which is exactly what to test in the WHERE clause. (Remember, ROWNUM is assigned before ORDER BY is done in the same auxiliary request). You must add a using ROWNUM or ROW_NUMBER analytic function. either way requires some preparation to be done in a subquery.

    For example, the following query has an ORDER BY clause, added to the request slot, so that ROWNUM in the main query will be more arbitrary:

    with t as (select 1 a,'d' b from dual
union select 8 a,'t' b from dual
union select 3 a,'u' b from dual
union select 7 a,'k' b from dual
ORDER BY  b                              -- Added
)
SELECT    t.*
,       ROWNUM
FROM        t
WHERE       ROWNUM     <= 2     -- Added
ORDER BY  b
;

    Output:

    `        A B     ROWNUM
---------- - ----------
         1 d          1
         7 k          2

    It is no coincidence that the numbers in the column ROWNUM are 1 and 2. If you want really to arbitrary numbers (such as 1 and 3), you will need an another subquery.

  • Using the cursor to another (nested cursors) cursor objects...?

    Now, I'm pretty sure that's not possible, but as a last thought of the station, it would not hurt to ask.

    I have a number of fairly complex cursors in PL/SQL (all beautifully packaged upwards), which are used in a number of other different queries for reporting. Because the same cursor is reused several times in different contexts, I want set the cursor once, then use it as a subquery in the other queries. This will also help as if I place the SQL directly in other queries, then it will be necessary propagate the changes to the base query in all other queries which use - and that it will be maintained by a large team that goes forward, it would be wide open to things being missed... (not that I don't trust my colleagues or anything like that...!)

    So, in brief and simple terms, if I;

    CURSOR curDateList (pi_start_date AS, pi_end_date IN DATE)
    IS
    SELECT pi_start_date + rownum - 1 when
    FROM (select '1' sys.dual connects by level < = (pi_end_date - pi_start_date + 1));

    that returns a list of the dates of pi_start_date to pi_end_date, and I want to integrate in another slider like;

    CURSOR curEmpWork (pi_start_date AS, pi_end_date IN DATE)
    IS
    SELECT e.employee_id, dl.when, e.work_pattern
    OF e xxx.emp_work_patterns,.
    DL curDateList (pi_start_date, pi_end_date)
    WHERE dl.when = e.roster_date
    ORDER BY e.roster_date;

    (Needless to say that queries are much more complex and many!)

    I reached the required result by using the pipeline table functions that just open the first cursor and run each line, but am frequently end up using multiple nested functions to achieve and I see marked in this way, then the performance degradation that comes to nest queries within the other runs a lot faster. As a nested query is just a nested cursor, it seems that this is possible, but I'm not only have no chance - I am struggling to find something that says that it of possible or not (which made me think I am barking the wrong tree here!)

    Any help would be greatly appreciated.

    No, it is not possible, but have you thought of creating a view instead?

  • Choose a group with the special value

    I have table below. Each client has a few accounts with different interest rates.

    customer

    account

    interestRate

    Balance

    one

    1

    28

    100

    one

    2

    24

    200

    one

    3

    20

    50

    b

    4

    19

    60

    b

    5

    20

    90

    c

    6

    24

    150

    d

    7

    19

    20

    d

    8

    24

    70

    d

    9

    24

    10

    d

    10

    15

    30

    I want to select customers with interestRate = 24 and the balance of their accounts, as it the sum

    one

    100 + 200 + 50

    c

    150

    d

    20 + 70 + 10 + 30

    I can do this with nested query, but I'm looking to recover these data with a query with minimum cost

    The global version

    Thanks for the borrowed data

    with cust as

    (

    Select 'a' customer, '1' account, '28' rate, 100' ball of all the double union

    Select 'a' customer, '2' account, '24' rate, 200' dance of all the double union

    Select 'a' customer, '3' account, '20' rate, 50' dance of all the double union

    customer select 'b', '4' account '19', 60' dance of all the double union

    customer select 'b', '5' account '20', 90' dance of all the double union

    Select customer 'c', "6", rate '24', '150' ball of all the double union

    Select ' client '7' account, rate ' 19', 20' dance of all the double union

    Select ' client '8' account, rate ' 24', 70' dance of all the double union

    Select ' client '9' account, rate ' 24', 10' ball of all the double union

    Select ' client '10' account, rate ' 15', 30' double ball

    )

    Select customer, sum (bal) sum_bal

    the cust

    Customer group

    having count (case rates when '24' then 1 end) > 0

    order by customer

    CUSTOMER SUM_BAL
    one 350
    c 150
    d 130

    Concerning

    Etbin

  • substring of dynamic position

    Dear experts,

    I need to implement this:

    [email protected]

    [email protected]

    [email protected]

    and extract just

    Domain1.com

    domain123.com

    DOM.com

    My idea:

    SELECT SUBSTR)

    E-mail

    (BY SELECTING INSTR (EMAIL,'@',1) IN EMAILTABLE),

    100)

    OF EMAILTABLE;

    but the error:

    ORA-01427: einreihig subquery returns multiple rows

    01427 00000 - "einreihig subquery returns several lines.

    * Cause:

    * Action:

    No need for the nested query:

    SELECT SUBSTR)

    E-mail

    INSTR (EMAIL,'@',1),

    100)

    OF EMAILTABLE;

Maybe you are looking for

  • GMAIL appear in a small box on the upper right corner

    When logging into GMAIL it appear inside a small box on the upper rightI tried to disable all Addons and Plugins, I tried to delete the cookies and cache, I tried to upgrade the display driver, I tried to change the resolution, no help. URL of affect

  • Portege R500 - Touchpad does not scroll after Windows 7 upgrade

    Hello!! Happy new year!! I got a great Christmas present, an upgrade to windows 7, so I upgraded the operating system of my Portege R500 of Bussiness from Vista to Windows 7 Home Premium. Up here, the performance of the laptop has improved BUT the to

  • system repair

    Impossible to change the date or month on system repair screen, I put manually the date I wanted, but it also highlights todays date and the custom are loose. I have something virus going on that's why I wanted to come back to fall 1 2010... can some

  • [VPN site to Site] Are route explicit LAN remote necessary?

    Hello I have configured the VPN Site to be used inside the interface of the ASA (9.4.1) site2site_inside.jpg The computer in the Zone 1 (192.168.1.1), I can access the Intranet all and it works without a problem--> all traffic through the VPN. For ex

  • cannot open hotmail

    Is Hotmail more responsible, so can not cope