Better way to write the simple query?

I'm trying to get the date of 'busy' max 'mansion '.

It is an example, I imagined, since I can't post our actual data. The following query works, but is their path easier.
CREATE TABLE TEST_TABLE (  
LOAN_NUMBER                 VARCHAR2(15 Byte),
UN_ID                       NUMBER,
CHANGE_DATE                 DATE,
PROP_TYPE                   VARCHAR2(25 Byte),
OCCSTAT                     VARCHAR2(25 Byte)
); 
COMMIT;


INSERT INTO TEST_TABLE VALUES (123456,  1,'01-JAN-09','Tent','Occupied');
INSERT INTO TEST_TABLE VALUES (123456,  2,'01-FEB-09','Shack','Occupied');
INSERT INTO TEST_TABLE VALUES (123456,  3,'01-JUN-08','Single Family','Occupied');
INSERT INTO TEST_TABLE VALUES (123456,  4,'01-OCT-08','Single Family Plus','Occupied');
INSERT INTO TEST_TABLE VALUES (123456,  5,'01-DEC-08','Mansion','Occupied');
INSERT INTO TEST_TABLE VALUES (123456,  6,'05-JAN-09','Mansion','Unoccupied');
COMMIT;
Reason, I take the ID's for the second join because I know that the ID max = max.
select     
i2.UN_ID,
i2.CHANGE_DATE,
i2.PROP_TYPE,
i2.OCCSTAT
from 
(
    select 
        distinct(LOAN_NUMBER) AS "LOAN_ID", 
        max(UN_ID) AS "ID_MAX"
    from(
    select 
        LOAN_NUMBER,
        UN_ID
  from
        TEST_TABLE
    where OCCSTAT = 'Occupied'
    group by LOAN_NUMBER, UN_ID
    ) 
    group by LOAN_NUMBER
)i
left join TEST_TABLE i2 on i.ID_MAX = i2.UN_ID
easier way without the second join?

Thanks in advance.

R

Try this query, it should be equivalent to your:

select UN_ID, CHANGE_DATE, PROP_TYPE, OCCSTAT
from (
    select LOAN_NUMBER, UN_ID, CHANGE_DATE, PROP_TYPE, OCCSTAT, rank() over(partition by LOAN_NUMBER order by un_id desc) rn
    from test_table
     where OCCSTAT = 'Occupied'
)
where rn=1

Max

Tags: Database

Similar Questions

  • Best way to write the following query

    Hello
    I have following table structures and data...
    And I wrote the request in order to obtain records that are superior to BBB-
    But could you please me to write in a simpler way.
    create table obj (ob_id )
as select 1 from dual union all
select 2 from dual union all
select 3 from dual union all
select 4 from dual union all
select 5 from dual union all
select 6 from dual

create table og_dt (or_id , rt_cd,rt_ct_cd)
AS SELECT 1 ,'B','BRID' FROM DUAL UNION ALL
   SELECT 1 ,'B','BRD' FROM DUAL UNION ALL
   SELECT 2 ,'BB-','ACR' FROM DUAL UNION ALL
   SELECT 2 ,'BB-','AQCR' FROM DUAL UNION ALL
   SELECT 3 ,'BBB','QYRE' FROM DUAL UNION ALL
   SELECT 4 ,'BB+','TUR' FROM DUAL UNION ALL
   SELECT 5 ,'BBB-','KUYR' FROM DUAL 
   
   
create table rt_srt (srt_ord,rt_cd,rt_ct_cd)
as select 50 ,'B','VID' FROM DUAL UNION ALL
   SELECT 50 ,'B','BRD' FROM DUAL UNION ALL
   SELECT 40 ,'BB-','ACR' FROM DUAL UNION ALL
   SELECT 41 ,'BB-','AQCR' FROM DUAL UNION ALL
   SELECT 30 ,'BBB','QYRE' FROM DUAL UNION ALL
   SELECT 33 ,'BB+','TUR' FROM DUAL UNION ALL
   SELECT 20 ,'BBB-','KUYR' FROM DUAL 
   
      
select distinct 
*
   from obj,og_dt,rt_srt
  where obj.ob_id=og_dt.or_id
  and og_dt.rt_cd = rt_srt.rt_cd
  and og_dt.rt_ct_cd=rt_srt.rt_ct_cd
and rt_srt.srt_ord > all (select rt_srt.srt_ord from rt_srt
where rt_cd='BBB-'
    I used the table rt_srt twise in the above query
    Could you advice please write it in simple way.

    Thank you

    Here's the implementation plans for 3 possible solutions (including the one you posted). Solutions of second & third assumes that rt_srt.srt_ord is not null:

    SQL> explain plan for
  2  select  distinct *
  3    from  obj,
  4          og_dt,
  5          rt_srt
  6    where obj.ob_id = og_dt.or_id
  7      and og_dt.rt_cd = rt_srt.rt_cd
  8      and og_dt.rt_ct_cd = rt_srt.rt_ct_cd
  9      and rt_srt.srt_ord > all (
 10                                select  rt_srt.srt_ord
 11                                  from  rt_srt
 12                                  where rt_cd = 'BBB-'
 13                               )
 14  /

Explained.

SQL> @?\rdbms\admin\utlxpls

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
Plan hash value: 3210303028

---------------------------------------------------------------------------------
| Id  | Operation              | Name   | Rows  | Bytes | Cost (%CPU)| Time     |
---------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |        |     7 |   504 |    16  (25)| 00:00:01 |
|   1 |  HASH UNIQUE           |        |     7 |   504 |    16  (25)| 00:00:01 |
|   2 |   MERGE JOIN ANTI NA   |        |     7 |   504 |    15  (20)| 00:00:01 |
|   3 |    SORT JOIN           |        |     7 |   385 |    11  (19)| 00:00:01 |
|*  4 |     HASH JOIN          |        |     7 |   385 |    10  (10)| 00:00:01 |
|*  5 |      HASH JOIN         |        |     7 |   238 |     7  (15)| 00:00:01 |

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
|   6 |       TABLE ACCESS FULL| OBJ    |     6 |    78 |     3   (0)| 00:00:01 |
|   7 |       TABLE ACCESS FULL| OG_DT  |     7 |   147 |     3   (0)| 00:00:01 |
|   8 |      TABLE ACCESS FULL | RT_SRT |     7 |   147 |     3   (0)| 00:00:01 |
|*  9 |    SORT UNIQUE         |        |     1 |    17 |     4  (25)| 00:00:01 |
|* 10 |     TABLE ACCESS FULL  | RT_SRT |     1 |    17 |     3   (0)| 00:00:01 |
---------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   4 - access("OG_DT"."RT_CD"="RT_SRT"."RT_CD" AND

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
              "OG_DT"."RT_CT_CD"="RT_SRT"."RT_CT_CD")
   5 - access("OBJ"."OB_ID"="OG_DT"."OR_ID")
   9 - access("RT_SRT"."SRT_ORD"<="RT_SRT"."SRT_ORD")
       filter("RT_SRT"."SRT_ORD"<="RT_SRT"."SRT_ORD")
  10 - filter("RT_CD"='BBB-')

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

31 rows selected.

SQL> explain plan for
  2  select  distinct *
  3    from  obj,
  4          og_dt,
  5          rt_srt
  6    where obj.ob_id = og_dt.or_id
  7      and og_dt.rt_cd = rt_srt.rt_cd
  8      and og_dt.rt_ct_cd = rt_srt.rt_ct_cd
  9      and rt_srt.srt_ord > (
 10                            select  max(rt_srt.srt_ord)
 11                              from  rt_srt
 12                              where rt_cd = 'BBB-'
 13                           )
 14  /

Explained.

SQL> @?\rdbms\admin\utlxpls

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
Plan hash value: 3391900174

---------------------------------------------------------------------------------
| Id  | Operation              | Name   | Rows  | Bytes | Cost (%CPU)| Time     |
---------------------------------------------------------------------------------
|   0 | SELECT STATEMENT       |        |     1 |    55 |    14  (15)| 00:00:01 |
|   1 |  HASH UNIQUE           |        |     1 |    55 |    14  (15)| 00:00:01 |
|*  2 |   HASH JOIN            |        |     1 |    55 |    10  (10)| 00:00:01 |
|   3 |    MERGE JOIN CARTESIAN|        |     2 |    68 |     6   (0)| 00:00:01 |
|*  4 |     TABLE ACCESS FULL  | RT_SRT |     1 |    21 |     3   (0)| 00:00:01 |
|   5 |      SORT AGGREGATE    |        |     1 |    17 |            |          |

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
|*  6 |       TABLE ACCESS FULL| RT_SRT |     1 |    17 |     3   (0)| 00:00:01 |
|   7 |     BUFFER SORT        |        |     6 |    78 |     3   (0)| 00:00:01 |
|   8 |      TABLE ACCESS FULL | OBJ    |     6 |    78 |     3   (0)| 00:00:01 |
|   9 |    TABLE ACCESS FULL   | OG_DT  |     7 |   147 |     3   (0)| 00:00:01 |
---------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   2 - access("OBJ"."OB_ID"="OG_DT"."OR_ID" AND
              "OG_DT"."RT_CD"="RT_SRT"."RT_CD" AND

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
              "OG_DT"."RT_CT_CD"="RT_SRT"."RT_CT_CD")
   4 - filter("RT_SRT"."SRT_ORD"> (SELECT MAX("RT_SRT"."SRT_ORD") FROM
              "RT_SRT" "RT_SRT" WHERE "RT_CD"='BBB-'))
   6 - filter("RT_CD"='BBB-')

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

30 rows selected.

SQL> explain plan for
  2  select  distinct obj.*,
  3                   og_dt.*,
  4                   rt_srt.srt_ord,
  5                   rt_srt.rt_cd,
  6                   rt_srt.rt_ct_cd
  7    from  obj,
  8          og_dt,
  9          (
 10           select  t.*,
 11                   max(case rt_cd when 'BBB-' then srt_ord end) over() max_srt_ord
 12             from  rt_srt t
 13          ) rt_srt
 14    where obj.ob_id = og_dt.or_id
 15      and og_dt.rt_cd = rt_srt.rt_cd
 16      and og_dt.rt_ct_cd = rt_srt.rt_ct_cd
 17      and rt_srt.srt_ord > max_srt_ord
 18  /

Explained.

SQL> @?\rdbms\admin\utlxpls

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
Plan hash value: 998396165

--------------------------------------------------------------------------------
| Id  | Operation             | Name   | Rows  | Bytes | Cost (%CPU)| Time     |
--------------------------------------------------------------------------------
|   0 | SELECT STATEMENT      |        |     7 |   476 |    11  (19)| 00:00:01 |
|   1 |  HASH UNIQUE          |        |     7 |   476 |    11  (19)| 00:00:01 |
|*  2 |   HASH JOIN           |        |     7 |   476 |    10  (10)| 00:00:01 |
|*  3 |    HASH JOIN          |        |     7 |   238 |     7  (15)| 00:00:01 |
|   4 |     TABLE ACCESS FULL | OBJ    |     6 |    78 |     3   (0)| 00:00:01 |
|   5 |     TABLE ACCESS FULL | OG_DT  |     7 |   147 |     3   (0)| 00:00:01 |

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
|*  6 |    VIEW               |        |     7 |   238 |     3   (0)| 00:00:01 |
|   7 |     WINDOW BUFFER     |        |     7 |   147 |     3   (0)| 00:00:01 |
|   8 |      TABLE ACCESS FULL| RT_SRT |     7 |   147 |     3   (0)| 00:00:01 |
--------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   2 - access("OG_DT"."RT_CD"="RT_SRT"."RT_CD" AND
              "OG_DT"."RT_CT_CD"="RT_SRT"."RT_CT_CD")
   3 - access("OBJ"."OB_ID"="OG_DT"."OR_ID")

PLAN_TABLE_OUTPUT
---------------------------------------------------------------------------------------
   6 - filter("RT_SRT"."SRT_ORD">"MAX_SRT_ORD")

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

27 rows selected.

SQL>

    SY.

    Published by: Solomon Yakobson on May 7, 2012 16:46

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  FROM allrows s01, allrows s02, allrows s07, allrows s08, allrows s09
 WHERE s01.tesc_code = 'S01'
   AND s02.tesc_code = 'S02'
   AND s07.tesc_code = 'S07'
   AND s08.tesc_code = 'S08'
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    Oracle version 11R2
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  s.owner, s.synonym_name, s.table_name, s.table_owner, s.db_link, InitCap(o.object_type) object_type
from   
  sys.DBA_SYNONYMS s, sys.DBA_OBJECTS o
where  
  s.synonym_name is not null
and    
  s.table_owner = o.owner (+)
and    
  s.table_name = o.object_name (+)
and    
  s.owner = 'PUBLIC'
and
  object_type is null; 
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    I don't know exactly what 'better' means in this context (faster, easier to read, etc.), but I tend to use a NOT EXISTS

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  • A better way to rearrange the sort in Pivot mode?

    Hello
    First question - is there a better way to do it?

    Background - have a simple pivot w / requirements to the Status column so that logic to not alphabetical company.
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    My solution has been to create a column iin table view, use a CASE to say one time statement accepted = 1, etc.. I then sorted CSA, hidden column in a table view and then rotate view I added the status column and hid the new CASE column. I get the results that I expected, but I was wondering if there was a better way to do it?

    Thanks - years

    As far as the presentation layer is concernd (i.e., in the responses) your way is the best I can think of. The only way you can sort a list of values outside the way that the system can determine automatically (for example, in alphabetical, chronological, order numerically, etc.) is to create your own definition. Without human intervention or custom rules, there is no way any system know that 'C' must come before the "S" (as in "Assigned" and "Accepted" or "O" should come before the 'L' as in 'Complete' and 'Closed').

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    Hello

    I tried different possibilities and seems to run the following:

    Create a report questioning in NORMAL SQL function to help:

    SELECT
APEX_ITEM.HIDDEN(1,EMPNO) || APEX_ITEM.TEXT(2,ENAME) ename,
CASE WHEN DEPTNO = 10 THEN
 APEX_ITEM.HIDDEN(3, SAL) || SAL
ELSE
 APEX_ITEM.TEXT(3, SAL)
END SAL,
EMPNO,
DEPTNO || APEX_ITEM.MD5_CHECKSUM(ENAME, SAL) DETPNO
FROM EMP

    Do not specify something special for column definitions.

    Create a button that submits the page.

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    BEGIN
APEX_ITEM.MULTI_ROW_UPDATE('#OWNER#:EMP:EMPNO,1:,|ENAME,2:SAL,3');
END;

    I've done here: http://htmldb.oracle.com/pls/otn/f?p=55041:35

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    Andy

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  • Best way to write the earpiece button code?

    Hello

    I'm trying to update several fields when the user clicks a button. I have a meter static val in a separate category that determines what value is displayed when you click a field. Why should I do the final BigVector? I thought I should be impossible to add elements once a var has been marked as final? Is there a better way to achieve what I'm doing?

    Here is my code, thank you--

    final BigVector bigStringVectorA = new BigVector();
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    bigStringVectorA.addElement ("a response 3 Test");

    aAnswerOptionButton.setChangeListener (new FieldChangeListener() {}
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  • How to write the select query for it

    Hello

    I had an html form and the area I drop down and he needs to select several values in the drop-down box. When I select multiple values then I have to write the query to SQL select statement.

    When I try to write the select statement and trying to run I get the error message.

    Select * from Table

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    Thank you

    Use the keyword sql 'in '.  If you don't know how, I've heard good things about the book Teach Yourself SQL in 10 Minutes by Ben Forta.

  • Unit test: is there a way to make the dynamic query of the value of running after the boot process?

    I wonder why the dynamic value query is executed before the boot process? Logically, it makes sense to run after them.

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    Thank you

    Val

    As this thread does no traction/attention of the team of SQL Developer for a while, I had to submit a request for formal improvement on metalink:

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    Thank you

    Val

  • Problem with the simple query.

    Hi all

    I am facing problem with the query below

    Select A.COL1, A.COL2

    B.COL1, B.COL2

    FROM TABLE1 A

    TABLE 1 B

    WHERE A.header = '123'

    AND B.header = '123'

    AND nvl (A.COL6, 'ABC') = 'ABC '.

    AND NVL (B.COL6, 'DEF') = 'DEF '.

    Basically, my requiremenyt is: I have only one table, TABLE1 here, which has a line two lines (for the same header) as "ABC" and another is "DEF". Table 1 has two columns (col1, col2) that should be displayed for both lines.

    When the header has two records in table1 top query works. and but if I do not have a record for any header example there are a record for "abc" in col6 only. so my query above does not work because there is no record for 'DEF' in col6. But I want to again request to fecth the output (for b.col1 and b.col2 should have null values)

    could you pls suggest me how to get the 4 columns.

    Thanks in advance

    Kind regards

    UVA.

    Try to place the status of outer join on column: analytical_criterion_code as

    and nvl (AUDIT.analytical_criterion_code, 'AUDIT2') = 'verification2. '

    .

    .

    and nvl (TRANS.analytical_criterion_code, 'TRANS2') = 'TRANS2.

    In the sub query based on the opinions that you have given in post # 1, although there is no value "DEF * ' for col6 due to the condition of outer join on b.col6 (+) line is extracted with b.col [1,2,3] as NULL values. Try to remove the (+) sign b.col6 and test.

    with t as)

    Select 111 col1, col2 'aaa', 'ABC' col6 123 header of all the double union

    Select 222 'bbb', 'DEF' col6, 123 double header

    )

    q as (select 123 double header)

    Select A.COL1, A.COL2, A.COL6

    B.COL1, B.COL2, b.COL6

    q.header

    T a

    t b

    q

    where a.col6 (+) = 'ABC '.

    and b.col6 (+) = "DEF."

    and q.header = a.header (+)

    and q.header = b.header (+)

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