order by with rownum
Hi Hello all please help me I want to choose folder 100 100000 record Albums, but my answer to the query is too slow. Please give me an idea to improve this issue.
Select *.
from (SELECT *)
of dhcpactivitylogs
WHERE CREATEDDATE BETWEEN
18 NOVEMBER 14 1.00.00 AM'
AND
21 NOVEMBER 14 12.00.00 PM'
dhcpactivitylogsid desc order)
where rownum < = 100;
If im using simple rownum works it random return 100 and I need top 100.
If there are indexes on (DHCPACTIVITYLOGSID, CREATEDDATE) and the query is changed, a little bit like below, you should see "stop key" somewhere in the plan which comes only 100 lines in the order of the index.
Select *.
from (SELECT t.*, rownum rn
of dhcpactivitylogs t
WHERE CREATEDDATE BETWEEN
18 NOVEMBER 14 1.00.00 AM'
AND
21 NOVEMBER 14 12.00.00 PM'
dhcpactivitylogsid desc order)
-where rownum<=>
where rn<=>
Tags: Database
Similar Questions
-
ORDER BY with ROWNUM in the selection list
Hello
I have the query as the bellows for Oracle 11 g:
create the table em_c (int vl_s_ec, int id_em_em, int id_empcre_ecr, int id_em_ec);
create em table (int id_em_em)
Select e.id_em_em
NVL)
(SELECT * FROM (SELECT a.vl_s_ec FROM em_c a WHERE a.id_em_em = ec.id_em_em))
AND a.id_empcre_ecr < ec.id_em_ec order of a.id_em_ec DESC) WHERE ROWNUM < = 1), 0) AS col2
Of em_c ec
INNER JOIN em e on ec.id_em_em = e.id_em_em
WHERE 1 = 1;
But internal subselect doesn't see table "em_c ec" of outer FROM clause. This is why the following error occurs:
SQL error: ORA-00904: "EC". "" ID_EM_EC ": invalid identifier
Please, help me to make it work.
Published by: user11290901 on December 17, 2010 02:11SELECT e.id_em_em, ( SELECT nvl(max(a.vl_s_ec) KEEP(DENSE_RANK LAST ORDER BY a.id_em_ec),0) FROM em_c a WHERE a.id_em_em = ec.id_em_em ) AS col2 FROM em_c ec INNER JOIN em e on ec.id_em_em = e.id_em_em WHERE 1 = 1 /SY.
-
order by with analytic function
Hi gurus
Need your help again.
I have the following data.
Examples of data
Select * from
(
As with a reference
(
Select ' 100 ', ' 25' grp lb, to_date('2012-03-31') ter_dt, 'ABC' package_name FROM DUAL union all
Select ' 100 ', ' 19', to_date ('2012-03-31'), 'AA' OF the whole union DOUBLE
Select ' 200 ', ' 25', to_date('2012-03-31'), 'CC' FROM DUAL union all
Select ' 300 ', ' 28', to_date('2012-03-31'), 'XX' from DUAL union all
Select ' 300 ', ' 28', to_date('4444-12-31'), 'XY' from DUAL
)
Select the grp, lb, ter_dt, Package_name
ROW_NUMBER() over (partition by order of grp by case when lb = '19' then 1)
When lb = '25' then 2
ro_nbr end)
Reference)
-where ro_nbr = 1
;
-----------
The query above returns the following result:
Existing query result
GRP LB TER_DT package_name RO_NBR
100 19 03/12/31 AA 1 100 25 03/12/31 ABC 2 200 25 03/12/31 CC 1 300 28 03/12/31 XX 1 300 28 44 12-31 XY 2 If you can see the data above then I use the order clause with function row_number analytic and prioritize data according to LB using the order by clause.
Now the problem is I need simple stored against each group so I write the following query:
Query
Select * from
(
As with a reference
(
Select ' 100 ', ' 25' grp lb, to_date('2012-03-31') ter_dt, 'ABC' package_name FROM DUAL union all
Select ' 100 ', ' 19', to_date ('2012-03-31'), 'AA' OF the whole union DOUBLE
Select ' 200 ', ' 25', to_date('2012-03-31'), 'CC' FROM DUAL union all
Select ' 300 ', ' 28', to_date('2012-03-31'), 'XX' from DUAL union all
Select ' 300 ', ' 28', to_date('4444-12-31'), 'XY' from DUAL
)
Select the grp, lb, ter_dt, Package_name
ROW_NUMBER() over (partition by order of grp by case when lb = '19' then 1)
When lb = '25' then 2
ro_nbr end)
Reference)
where ro_nbr = 1
;
The query result
GRP LB TER_DT RO_NBR
100 19 03/12/31 AA 1 200 25 03/12/31 CC 1 300 28 03/12/31 XX 1 My required result is that 300 GRP contains 2 folders and I need the record with the latest means of ter_dt and right now, I only get the latest.
My output required
GRP LB TER_DT RO_NBR
100 19 03/12/31 AA 1 200 25 03/12/31 CC 1 300 28 44 12-31 XY 1 Please guide. Thank you
Hello
The query you posted is the ro_nbr assignment based on nothing other than lb. When there are 2 or more lines that have an equal claim to get assigned ro_nbr = 1, then one of them is chosen arbitrarily. If, when a tie like that occurs, you want the number 1 to be assigned based on some sort, and add another expression of Analytics ORDER BY clause, like this:
WITH got_ro_nbr AS
(
SELECT the grp, lb, ter_dt, nom_package
ROW_NUMBER () OVER (PARTITION BY grp
ORDER OF CASES
WHEN lb = '19' THEN 1
WHEN lb = '25' THEN 2
END
, ter_dt DESC-* NEW *.
) AS ro_nbr
REFERENCE
)
SELECT the grp, lb, ter_dt, nom_package
OF got_ro_nbr
WHERE ro_nbr = 1
;
-
Subselect with Rownum and Order By
Good morning, people, I'm trying to do some Firebird SQL work in Oracle and there is something that I can't find an easy way to deal with:
CUSTOMER has many RECIPES, let's say I want the ID of the last receipt of a customer...
That's how it's done in FB:
SELECT
c.ID, c.name,
(SELECT FIRST r.id 1
RECEPTION r
WHERE r.customer_id = c.id
ORDER BY r.creation_date DESC) as LAST_RECEIPT_ID
CUSTOMER c
It's simple and works like a charm... the subselect statement will order first of all, the most recent reception will be the first line, then I use to avoid any error 'select several lines in singleton' a 'first 1 ", equivalent to rownum = 1;
If I try this with Oracle it won't work:
SELECT
c.ID, c.name,
(SELECT r.id
RECEPTION r
WHERE r.customer_id = c.id
AND rownum = 1
ORDER BY r.creation_date DESC) as LAST_RECEIPT_ID
CUSTOMER c
What is the best way to achieve the same in Oracle?
SELECT c.id , c.name , (SELECT MAX(r.id) KEEP (DENSE_RANK FIRST ORDER BY r.creation_date DESC) last_receipt_id FROM receipt r WHERE r.customer_id = c.id) as last_receipt_id FROM customer c; -
How to order by working with rownum
Oracle worm: 11g
Hi all
I have 2 cases here, with external control by one and another without external by command.
I see no difference in the results for the moment.
Case 1:
Case 2:/* Formatted on 4/30/2013 2:12:28 PM (QP5 v5.240.12305.39446) */ SELECT * FROM ( SELECT ROWNUM rn, id FROM (SELECT 9 AS id FROM DUAL UNION ALL SELECT 1 FROM DUAL UNION ALL SELECT 14 FROM DUAL UNION ALL SELECT 7 FROM DUAL UNION ALL SELECT 5 FROM DUAL UNION ALL SELECT 6 FROM DUAL UNION ALL SELECT 13 FROM DUAL UNION ALL SELECT 8 FROM DUAL UNION ALL SELECT 2 FROM DUAL UNION ALL SELECT 4 FROM DUAL UNION ALL SELECT 19 FROM DUAL UNION ALL SELECT 3 FROM DUAL) ORDER BY id) WHERE rn BETWEEN 1 AND 6;
I added the command by external clause in this case
But I want to make sure if I really need to have the order of outer query by here.
Thank you/* Formatted on 4/30/2013 2:12:28 PM (QP5 v5.240.12305.39446) */ SELECT * FROM ( SELECT ROWNUM rn, id FROM (SELECT 9 AS id FROM DUAL UNION ALL SELECT 1 FROM DUAL UNION ALL SELECT 14 FROM DUAL UNION ALL SELECT 7 FROM DUAL UNION ALL SELECT 5 FROM DUAL UNION ALL SELECT 6 FROM DUAL UNION ALL SELECT 13 FROM DUAL UNION ALL SELECT 8 FROM DUAL UNION ALL SELECT 2 FROM DUAL UNION ALL SELECT 4 FROM DUAL UNION ALL SELECT 19 FROM DUAL UNION ALL SELECT 3 FROM DUAL) ORDER BY id) WHERE rn BETWEEN 1 AND 6; ORDER BY id;
Rod.Hey, Rod,
SamFisher wrote:
... I see no difference in the results for the moment.You can not, but you are not sure that you will never see a difference. There may be a difference if you change versions, or if you add more data, or for no apparent reason.
If there is an ORDER BY clause in the main query (as in query 2) then the output is guaranteed to be in that order.
Is there no ORDER BY clause in the main query (as in the query 1), then there is no guarantee that the lines will be in a particular order. If Oracle finds it convenient to display rows in order by one of the columns (for example, rn) then she will do. You can't count on it always does the same thing, unless there is an ORDER BY clause.You should check the ROW_NUMBER analytic function. It is much more useful and easier to understand, as ROWNUM. (In this example, it maybe not simple, however.)
-
order by desc or ASC does not work with rownum
When you add a'm rownum < 2 order by asc or desc in my query, then it does not work.SQL> desc offer Name Null? Type ----------------------------------------- -------- ---------------------------- OFFER_ID NOT NULL NUMBER(14) DOMAIN_ID NUMBER(14) OFFERDATE TIMESTAMP(0) CONTACTPERSON VARCHAR2(36) EMAIL VARCHAR2(50) TEL VARCHAR2(23) CATEGORY NUMBER(2) AMOUNT NUMBER(5) STATUS NUMBER(2) SQL> ed Wrote file afiedt.buf 1 select to_char(offerdate,'dd-Mon-yyyy'), 2 offer_id, 3 amount 4 from 5 offer 6 where 7 domain_id=1 8 and amount is not null 9* order by offerdate desc SQL> / TO_CHAR(OFF OFFER_ID AMOUNT ----------- ---------- ---------- 27-Apr-2010 4 55 26-Apr-2010 5 45 26-Apr-2010 3 50 26-Apr-2010 2 45 /*****These may be Ten thousand rows*****/
I just want to display a disc of DB offerDate wiseSQL> ed Wrote file afiedt.buf 1 select to_char(offerdate,'dd-Mon-yyyy'), 2 offer_id, 3 amount 4 from 5 offer 6 where 7 domain_id=1 8 and amount is not null 9 and 10 rownum<2 11* order by offerdate desc SQL> / TO_CHAR(OFF OFFER_ID AMOUNT ----------- ---------- ---------- 26-Apr-2010 5 45 SQL> ed Wrote file afiedt.buf 1 select to_char(offerdate,'dd-Mon-yyyy'), 2 offer_id, 3 amount 4 from 5 offer 6 where 7 domain_id=1 8 and amount is not null 9 and 10 rownum<2 11* order by offerdate asc SQL> / TO_CHAR(OFF OFFER_ID AMOUNT ----------- ---------- ---------- 26-Apr-2010 5 45
Thank you in anticipationTry this
select to_char(offerdate,'dd-Mon-yyyy'), offer_id, amount from( select to_char(offerdate,'dd-Mon-yyyy'), offer_id, amount from offer where domain_id=1 and amount is not null order by offerdate asc) where rownum<2Published by: user12984479 on April 27, 2010 04:34
-
SYS_CONNECT_BY_PATH with rownum vs rownumber for top - N query
Oracle 9.2.0.8...
Try to use the sys_connect_by_path to build a common thread of our hierarchy. Using the following query top - N, based on the implementation of Tom Kyte rather use rownumber or rownum, sys_connect_by_path returns null:
If I apply the same query, but use rownum instead of rownumber, sys_connect_by_path returns good breadcrumb:SELECT * FROM (SELECT /*+ FIRST_ROWS(25) */ score (1), cc.category_type_id, cc.content_category_id, DECODE (:lang, 'EN', cc.content_category_name_en, cc.content_category_name_fr ) content_category_name, SYS_CONNECT_BY_PATH (DECODE (:lang, 'EN', cc.content_category_name_en, cc.content_category_name_fr ), ' \ ' ) content_bread_crumb, TO_CHAR (GREATEST (cc.date_updated, cc.date_created), 'yyyy/mm/dd' ) content_updated_date, ROW_NUMBER () OVER (ORDER BY score (1) DESC) rn FROM content_categories cc, CONTENTS c WHERE cc.content_category_id = c.content_category_id AND cc.category_type_id = 2 AND contains (c.top_html_content_en, '(("{employment}") AND (SYN({jobs},crt_thes)))', 1 ) > 0 AND cc.approval_ind = 1 CONNECT BY PRIOR cc.content_category_id = cc.content_category_parent_id START WITH cc.content_category_parent_id IS NULL) WHERE rn BETWEEN 1 AND 25
Sys_connect_by_path will return for example:SELECT * FROM (SELECT /*+ FIRST_ROWS(25) */ score (1), cc.category_type_id, cc.content_category_id, DECODE (:lang, 'EN', cc.content_category_name_en, cc.content_category_name_fr ) content_category_name, SYS_CONNECT_BY_PATH (DECODE (:lang, 'EN', cc.content_category_name_en, cc.content_category_name_fr ), ' \ ' ) content_bread_crumb, TO_CHAR (GREATEST (cc.date_updated, cc.date_created), 'yyyy/mm/dd' ) content_updated_date FROM content_categories cc, CONTENTS c WHERE cc.content_category_id = c.content_category_id AND cc.category_type_id = 2 AND contains (c.top_html_content_en, '(("{employment}") AND (SYN({jobs},crt_thes)))', 1 ) > 0 AND cc.approval_ind = 1 CONNECT BY PRIOR cc.content_category_id = cc.content_category_parent_id START WITH cc.content_category_parent_id IS NULL order by score(1) DESC) WHERE rownum BETWEEN 1 AND 25
Toolbox, information employee expectations with respect, employees of call performance centers
It seems that the first query executes better... base explain plan... so I prefer to use instead of rownum, but cannot if sys_connect_by_path fails
Any ideas?pl_sequel wrote:
Any ideas?
Just a suggestion. Mixture of hierarchical query with analytical functions could be highly combustible :). For example, 10.2.0.4.0 & 11.1.0.6.0:
select sys_connect_by_path(ename,'/') path from emp start with mgr is null connect by mgr = prior empno / PATH ---------------------------------------- /KING /KING/JONES /KING/JONES/SCOTT /KING/JONES/SCOTT/ADAMS /KING/JONES/FORD /KING/JONES/FORD/SMITH /KING/BLAKE /KING/BLAKE/ALLEN /KING/BLAKE/WARD /KING/BLAKE/MARTIN /KING/BLAKE/TURNER PATH ---------------------------------------- /KING/BLAKE/JAMES /KING/CLARK /KING/CLARK/MILLER 14 rows selected.Now add ROW_NUMBER:
SQL> select sys_connect_by_path(ename,'/') path, 2 row_number() over(order by sal) rn 3 from emp 4 start with mgr is null 5 connect by mgr = prior empno 6 / PATH RN ---------------------------------------- ---------- 1 2 3 4 5 6 7 8 9 10 11 PATH RN ---------------------------------------- ---------- 12 13 14 14 rows selected. SQL>Separates the analytical hierarchy part resolves the problem:
select path, row_number() over(order by sal) rn from ( select sys_connect_by_path(ename,'/') path, sal from emp start with mgr is null connect by mgr = prior empno ) / PATH RN ---------------------------------------- ---------- /KING/JONES/FORD/SMITH 1 /KING/BLAKE/JAMES 2 /KING/JONES/SCOTT/ADAMS 3 /KING/BLAKE/MARTIN 4 /KING/BLAKE/WARD 5 /KING/CLARK/MILLER 6 /KING/BLAKE/TURNER 7 /KING/BLAKE/ALLEN 8 /KING/CLARK 9 /KING/BLAKE 10 /KING/JONES 11 PATH RN ---------------------------------------- ---------- /KING/JONES/SCOTT 12 /KING/JONES/FORD 13 /KING 14 14 rows selected. SQL>SY.
-
SDO_RELATE within PL/SQL query with rownum clause runs slowly on 12 c - works great on 10 g
Hello
I use the database 12.1.0.2 with a node 2 RAC on Windows.
I am struck by a really weird performance problem with a particular query. Bear with me while I try to explain...
I have a chart with lines 30 sdo_geometry million, in 7 partitions with a local partitioned spatial index divided. Called BIG_PARTITIONED_TABLE for this example.
I query the table to search for one line with a geometry that is equal to the geometry of my request. In this case I use sdo_relate with "mask = equal". Instantly returns:
SQL> select id, geometry 2 from BIG_PARTITIONED_TABLE o 3 where sdo_relate(o.geometry, sdo_geometry(2002, 2157, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), 4 SDO_ORDINATE_ARRAY(604853.595, 692379.864, 604879.046, 692350.272)), 'mask=equal') = 'TRUE' 5 and rownum = 1; ID ---------- GEOMETRY(SDO_GTYPE, SDO_SRID, SDO_POINT(X, Y, Z), SDO_ELEM_INFO, SDO_ORDINATES) ------------------------------------------------------------------------------- 2.5405E+12 SDO_GEOMETRY(2002, 2157, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), SDO_ORDINATE_ARRAY(604853.595, 692379.864, 604879.046, 692350.272)) Elapsed: 00:00:00.10
But if I put the same query in PL/SQL, so it takes 21 seconds:
SQL> declare 2 l_id number; 3 l_geom sdo_geometry; 4 l_window_geom sdo_geometry; 5 begin 6 l_window_geom := sdo_geometry(2002, 2157, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), 7 SDO_ORDINATE_ARRAY(604853.595, 692379.864, 604879.046, 692350.272)); 8 9 select id, geometry 10 into l_id, l_geom 11 from BIG_PARTITIONED_TABLE o 12 where sdo_relate(o.geometry, l_window_geom, 'mask=equal') = 'TRUE' 13 and rownum = 1; 14 15 end; 16 / PL/SQL procedure successfully completed. Elapsed: 00:00:21.13
If I remove the "rownum = 1", then it returns instantly:
SQL> declare 2 l_id number; 3 l_geom sdo_geometry; 4 l_window_geom sdo_geometry; 5 begin 6 l_window_geom := sdo_geometry(2002, 2157, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), 7 SDO_ORDINATE_ARRAY(604853.595, 692379.864, 604879.046, 692350.272)); 8 9 select id, geometry 10 into l_id, l_geom 11 from BIG_PARTITIONED_TABLE o 12 where sdo_relate(o.geometry, l_window_geom, 'mask=equal') = 'TRUE'; 13 14 end; 15 / PL/SQL procedure successfully completed. Elapsed: 00:00:00.03
If using sdo_equal instead of sdo_relate and keep the "rownum = 1", then it returns instantly.
SQL> declare 2 l_id number; 3 l_geom sdo_geometry; 4 l_window_geom sdo_geometry; 5 begin 6 l_window_geom := sdo_geometry(2002, 2157, NULL, SDO_ELEM_INFO_ARRAY(1, 2, 1), 7 SDO_ORDINATE_ARRAY(604853.595, 692379.864, 604879.046, 692350.272)); 8 9 select id, geometry 10 into l_id, l_geom 11 from BIG_PARTITIONED_TABLE o 12 where sdo_equal(o.geometry, l_window_geom) = 'TRUE' 13 and rownum = 1; 14 15 end; 16 / PL/SQL procedure successfully completed. Elapsed: 00:00:00.13
Here is a comparison of the plans to explain. First, here's the good thing, that is using the spatial index (BIG_PARTITIONED_TABLE_SPIND):
select id, GEOMETRY FROM BIG_PARTITIONED_TABLE O WHERE SDO_EQUAL(O.GEOMETRY, :B1 ) = 'TRUE' AND ROWNUM = 1 call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 1 0.00 0.00 0 0 0 0 Execute 1 0.01 0.02 0 39 0 0 Fetch 1 0.00 0.01 0 31 0 1 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 3 0.01 0.04 0 70 0 1 Misses in library cache during parse: 0 Optimizer mode: ALL_ROWS Parsing user id: 263 (recursive depth: 1) Number of plan statistics captured: 1 Rows (1st) Rows (avg) Rows (max) Row Source Operation ---------- ---------- ---------- --------------------------------------------------- 1 1 1 COUNT STOPKEY (cr=99 pr=0 pw=0 time=43307 us) 1 1 1 PARTITION RANGE ALL PARTITION: 1 7 (cr=99 pr=0 pw=0 time=43297 us cost=0 size=66 card=1) 1 1 1 TABLE ACCESS BY LOCAL INDEX ROWID BIG_PARTITIONED_TABLE PARTITION: 1 7 (cr=99 pr=0 pw=0 time=43280 us cost=0 size=66 card=1) 1 1 1 DOMAIN INDEX BIG_PARTITIONED_TABLE_SPIND (cr=98 pr=0 pw=0 time=43250 us)
Then the slow that does not use the spatial index.
select id, GEOMETRY FROM BIG_PARTITIONED_TABLE O WHERE SDO_RELATE(O.GEOMETRY, :B1 , 'mask=equal') = 'TRUE' AND ROWNUM = 1 call count cpu elapsed disk query current rows ------- ------ -------- ---------- ---------- ---------- ---------- ---------- Parse 1 0.01 0.00 0 0 0 0 Execute 1 0.03 0.03 0 1123 0 0 Fetch 1 24.25 24.25 0 499429 0 1 ------- ------ -------- ---------- ---------- ---------- ---------- ---------- total 3 24.30 24.29 0 500552 0 1 Misses in library cache during parse: 1 Misses in library cache during execute: 1 Optimizer mode: ALL_ROWS Parsing user id: 263 (recursive depth: 1) Number of plan statistics captured: 1 Rows (1st) Rows (avg) Rows (max) Row Source Operation ---------- ---------- ---------- --------------------------------------------------- 1 1 1 COUNT STOPKEY (cr=499532 pr=0 pw=0 time=24289612 us) 1 1 1 HASH JOIN RIGHT SEMI (cr=499532 pr=0 pw=0 time=24289586 us cost=32 size=144 card=1) 1 1 1 VIEW VW_NSO_1 (cr=103 pr=0 pw=0 time=31110 us cost=29 size=98016 card=8168) 1 1 1 COLLECTION ITERATOR PICKLER FETCH SDO_PQRY (cr=103 pr=0 pw=0 time=31104 us cost=29 size=16336 card=8168) 16914892 16914892 16914892 PARTITION RANGE ALL PARTITION: 1 7 (cr=499429 pr=0 pw=0 time=28678375 us cost=3 size=6600 card=100) 16914892 16914892 16914892 TABLE ACCESS FULL BIG_PARTITIONED_TABLE PARTITION: 1 7 (cr=499429 pr=0 pw=0 time=23406547 us cost=3 size=6600 card=100)
I tried adding an indication / * + index (o BIG_PARTITIONED_TABLE_SPIND) * / but that did not help.
I am struck this issue during testing of upgrade 10.2.0.5 to 12.1.0.2. The query works perfectly on 10g - we note only that this question on 12 c.
I can't use sdo_equal as the real mask that we want is equal + dommagescausdspar + covers. I'm just using equal here to simplify the test.
I use "rownum = 1" because I want to just the first result. In practice I can rewrite probably is a FOR LOOP, I get out after the first result, but that seems all just awful.
Any ideas? If anyone has seen anything like this before? Its an optimizer delivers really so I'm going to cross post the SQL Forum after a certain time, but thought I would post it here first.
Thank you
John
Hi John,.
Can you please try the following before your slow queries event?
"ALTER session set events ' trace 54669 name context forever."
Thank you
Ying
-
select level as lvl --,1 as ordered from dual connect by level <=5 union all select rownum as lvl --,2 as ordered from dual connect by level <=5
How to order the query after the UNION ALL clause in descending order
My expected results
1
2
3
4
5
5
4
3
2
1
Select * from (select level as lvl-, 1 as ordered
of the double
connect by level<>
order by 1)
Union of all the
Select * from (select rownum as -lvl 2 as he ordered
of the double
connect by level<>
order by 1 desc)
-
I can not activate a new order paid with a different email address
After the trial period months using a gmail account, I paid a new order using an account of hotmail of mine, the order number of the answer of the adobe (for hotmail) can not be activated: my account is fixed with the old (and allegedly expired) gmail. Also when you try to change my ID in hotmail instead of gmail, it is said: "(impossible de changer,,,)." This is already a month and still the same.
How can we get the money. Then I can make a new order using the gmail email account.
Maybe European people who post here can help you with this question.
-
SQL performance problem associated with rownum.
Dear Experts,
I have a sql
SELECT TEMP.col1, TEMP.col2, TEMP.col3, TEMP.col4, TEMP.col5, ROWNUM, not
(SELECT col1, col2, col3, col4 FROM table1 ORDER BY DESC col4 col5) TEMP WHERE rownum between? and?
When I put the value of range rownum 1 and 100, it works very well. But when I put 101 and 200 no records returned.
So I modified it as fllows
SELECT TEMP.col1, TEMP.col2, TEMP.col3, TEMP.col4, TEMP.col5,NWR No. OF
(SELECT col1, col2, col3, col4, col5, rownum NWR FROM table1 ORDER BY DESC col4) TEMP WHERE NWR between? and?
It works fine and giving results desire. But the issue here is the modified SQL becomes very slow. It gives results in 20 minutes. Although SQL earlier gave results in a few seconds.
Records in table1 is 40 million.
Is there another way to get good performance results accurate?
Your help will be much appreciated.
Kind regards
DD
Hi try this... If you want that data should be in the specific order (as order by desc col4, then you can use analytical ROW_NUMBER() function as below). Try it out below and let me know in case of any problems
SELECT TEMP.col1,
TEMP.col2,
TEMP.col3,
TEMP.col4,
TEMP.col5,
NWR NO.
FROM (SELECT col1,
col2,
col3,
COL4,
col5,
ROW_NUMBER() over (ORDER BY DESC of col4) rno
FROM table1)
NWR WHERE between 101 AND 200;
(GOLD)
SELECT TEMP.col1,
TEMP.col2,
TEMP.col3,
TEMP.col4,
TEMP.col5,
NWR NO.
FROM (SELECT col1,
col2,
col3,
COL4,
col5,
ROW_NUMBER() OVER(ORDER BY col4 DESC) NWR
FROM table1)
WHERE NWR<=>
-
Hello guys,.
I'm working on this SQL charly, it's pretty simple and it worked very well, but then I tried to 'Join' a table to it and now I can't make it work.
The following SQL code works here.
Select *.
Of
(select a.*, rownum rnum
Of
(select a.field1, a.field2, a.field3, b.field4, b.field5, b.field6,
b.Field7, b.field8, b.field9, b.field10, b.field11, b.field12,
b.Field13, b.field14, b.field15, b.field16, b.field17,
b.field19, b.field20, b.field21, b.field22, b.veh_field22
from SCHEMA.tablename has,
/ * attach * / SCHEMA.tablename b
order of a.tablename_ID) a
where rownum < = 150
)
where rnum > = 147;
But, when I try to JOIN the SCHEMA.tablename b it tells me that I should add a "right parenthesis.
Will this work ROWNUM query even when you join other tables, or through it the fact off the coast in any way?
Thank you
Xev.
Xev,
I tried to reproduce your problem, but could not. Since you have not published the scripts required, I worked on your script schema SCOTT and its working fine.
SELECT * FROM
(
SELECT a.*, rownum rnum
Of
(SELECT e.ename,
d.DNAME
FROM scott.emp e,.
Scott.Dept d
ORDER BY e.deptno) a
WHERE rownum<>
WHERE rnum > = 10;
OUTPUT:
ENAME DNAME RNUM
---------- -------------- ----------
CLARK RESEARCH 10
MILLER ACCOUNTING 11
KING OF ACCOUNTING 12
SMITH, ACCOUNTANT 13
JONES, ACCOUNTING 14
-
Hi all
I have a PL/SQL query
SELECT COLUMN1 from TABLE1 ORDER BY Column1 DESC
Here the Column1 is a TIMESTAMP column (3).
I lists the records retrieved by this query in my java Application.
But I want to improve the performance of my application by selecting only 25 records at a time, which corresponds to the maximum number of records you can keep ina page of the application.
If the user clicks on the button records only the 25 next Page must be extracted and displayed.
I tried to use rownum
SELECT COLUMN1 FROM
(SELECT COLUMN1 from TABLE1 ORDER BY COLUMN1 DESC) A where ROWNUM clause BETWEEN 1 AND 25;
It worked! . He recovered properly than the first 25 records.
But trying to get the next 25 records using the sub query, I have nothing
SELECT COLUMN1 FROM
(SELECT COLUMN1 from TABLE1 ORDER BY COLUMN1 DESC) A where ROWNUM clause BETWEEN 26 AND 50;
COLUMN1
-------------------------
0 selected lines
Also the number of rows in the table is 99.
SELECT Count (1) from TABLE1 ORDER BY COLUMN1 DESC
COUNT (1)
----------------------
99
1 selected lines
Could someone please help me?
If there is no alternative possible pls share me.Christèle CS wrote:
Hi allBut trying to get the next 25 records using the sub query, I have nothing
SELECT COLUMN1 FROM
(SELECT COLUMN1 from TABLE1 ORDER BY COLUMN1 DESC) A where ROWNUM clause BETWEEN 26 AND 50;It wouldn't work that way to use ROWNUM.
You can use analytical works as an alternative to ROWNUM.
select * from ( select column1, column2, ... columnN, row_number() over (order by column1 desc) rn from table1 ) a where a.rn between 1 and 25; --> You can provide 26 and 50 as well. -
How to upgrade an ordered list with a constraint
Hi friends,
I need to update a column for all records in the table with a unique constraint
ex - select rec_no in tablename;
9
8
7
6
5
now I have to update this as
Select rec_no in tablename;
8
7
6
5
4
but when I do update tablename set rec_no = rec_no-1
I get unique constraint error
Please help meDJ wrote:
but when I do update tablename set rec_no = rec_no-1
I get unique constraint errorNo, you don't. Show us.
Oracle ensures consistency of 'duress of education. " If you perform an update statement (which is what you say above), then the Oracle will not give you a constraint error.
Because if she did, then we are all would have a serious problem: whether or not the update succeeds then depend on the order in which Oracle (ie. the implementation plan) happens to be updated lines. And we cannot have such behavior "undeterministic" (similar to what we would have if Oracle has not provided us with the error table mutation...).
Just so try, or show us:
create table uk_test (i number not null unique) / insert into uk_test values(4); insert into uk_test values(3); insert into uk_test values(2); commit;Now try these two:
update (select * from uk_Test order by i desc) set i=i-1; update (select * from uk_Test order by i) set i=i-1;They both succeed. Oracle allows temporary constraint violations during at the execution of a statement inside. There is no need to define this constraint postponed here.
I'm talking about consistency of statement here also-level constraint:
http://rulegen.blogspot.nl/2012/01/statement-level-constraint-validation.html
-
order by with an additional condition?
Hello
Oracle 11g r2.
I have a few items (let's say the dominoes of a domino game that are placed on one table in front of the other).
Sometimes, between the 2 items, I have a beam (piece of wood) which is an element too.
I have tables that store the entry and exit of each element and the distance accumulated between them.
A point is identified by a name of area (where it is placed), a class, a number (not really, just an identifier) and type of point (entry (E) or output (S)).
Here is an example of data:CREATE TABLE SPATIAL_POINTS ( SPAT_ID INTEGER, SPAT_AREA_NAME VARCHAR2(10), SPAT_CLASS VARCHAR2(15), SPAT_NUMBER VARCHAR2(15), SPAT_PT VARCHAR2(1), ... CONSTRAINT PK_SPAT_ID PRIMARY KEY(SPAT_ID), CONSTRAINT FK_SPAT_AREA FOREIGN KEY(SPAT_AREA_NAME) REFERENCES AREAS(AREA_NAME), CONSTRAINT CHK_SPAT_PT CHECK(SPAT_PT) IN ('E','S') ); CREATE TABLE ALL_COORDINATES ( ALL_ID INTEGER, ALL_SPAT_ID INTEGER, ALL_CUMUL NUMBER(15,9), ..., CONSTRAINT PK_ALL_ID PRIMARY KEY(ALL_ID), CONSTRAINT FK_ALL_SPAT_ID FOREIGN KEY(ALL_SPAT_ID) REFERENCES SPATIAL_POINTS(SPAT_ID), );
I want to display the points sorted by distance (as in the example), but I want to show at each point of exit right after the entry point, I don't want all the other points to apear beetween an entry and an exit point of the same element.select spat_area_name as "AREA", spat_class as "CLASS", spat_number as "NUMBER", spat_pt as "POINT", all_cumul as "CUMUL DIST" from spatial_points inner join all_coordinates on spat_id = all_spat_id where spat_area_name = 'P61' order by all_cumul, spat_class, spat_number, spat_pt AREA CLASS NUMBER POINT CUMUL DIST P61 POUTRE 01 E -0.07700 P61 CLSNA 0105 E 0.00000 P61 CLSNA 0105 S 0.00400 P61 CLSNB 0110 E 0.05600 P61 CLSNB 0110 S 0.12400 P61 CLBPE 0125 E 0.37240 P61 CLBPE 0125 S 0.37240 P61 CLSNC 0130 E 0.44500 P61 CLSNC 0130 S 0.45500 P61 CLSNC 0140 E 0.79500 P61 CLSNC 0140 S 0.80500 P61 CLSNC 0160 E 0.99500 P61 CLSNC 0160 S 1.00500 P61 CLMTV 0165 E 1.06100 P61 CLMTV 0165 S 1.14100 P61 CLBPE 0166 E 1.18440 P61 CLBPE 0166 S 1.18440 P61 CLSNC 0170 E 1.19500 P61 CLSNC 0170 S 1.20500 P61 POUTRE 01 S 1.32300 P61 POUTRE 02 E 1.36000 P61 CLSND 0210 E 1.37750 P61 CLSND 0210 S 1.42250 P61 CLPBU 0215 E 1.50700 P61 POUTRE 02 S 1.54200 ... ... ... ... ...
I want to order by cumulative distance of entry points (E) and then add the exit point (S) after each entry point regardless of the cumulative distance of the outlet. I hope I'm understandable!
Here is an example of what I want, according to the example above:
In this way 'E' and ' go for the points of the "BEAM", and we don't care about cumulative distance of ' point.AREA CLASS NUMBER POINT CUMUL DIST P61 POUTRE 01 E -0.07700 P61 POUTRE 01 S 1.32300 P61 CLSNA 0105 E 0.00000 P61 CLSNA 0105 S 0.00400 P61 CLSNB 0110 E 0.05600 P61 CLSNB 0110 S 0.12400 P61 CLBPE 0125 E 0.37240 P61 CLBPE 0125 S 0.37240 P61 CLSNC 0130 E 0.44500 P61 CLSNC 0130 S 0.45500 P61 CLSNC 0140 E 0.79500 P61 CLSNC 0140 S 0.80500 P61 CLSNC 0160 E 0.99500 P61 CLSNC 0160 S 1.00500 P61 CLMTV 0165 E 1.06100 P61 CLMTV 0165 S 1.14100 P61 CLBPE 0166 E 1.18440 P61 CLBPE 0166 S 1.18440 P61 CLSNC 0170 E 1.19500 P61 CLSNC 0170 S 1.20500 P61 POUTRE 02 E 1.36000 P61 POUTRE 02 S 1.54200 P61 CLSND 0210 E 1.37750 P61 CLSND 0210 S 1.42250 P61 CLPBU 0215 E 1.50700 ... ... ... ... ...
I tried some things with PARTITION BY, but without success.
Any idea on how I can achieve this? I need a query, no PL/SQL.
Thank you!
Yann.As...
select * from( select spat_area_name as "AREA", spat_class as "CLASS", spat_number as "NUMBER", spat_pt as "POINT", all_cumul as "CUMUL_DIST", min(CUMUL DIST) over(partition by spat_area_name) mn from spatial_points inner join all_coordinates on spat_id = all_spat_id where spat_area_name = 'P61' order by all_cumul, spat_class, spat_number, spat_pt) order by mn,AREA,CUMUL_DISTtested with the EMP table. The query below will be stopped first by empno, then it will show all employees of the particular department...
SQL> select empno,deptno 2 from scott.emp 3 order by empno; EMPNO DEPTNO ---------- ---------- 7369 20 7499 30 7521 30 7566 20 7654 30 7698 30 7782 10 7788 20 7839 10 7844 30 7876 20 7900 30 7902 20 7934 10 14 rows selected. SQL> select * 2 from( 3 select empno,deptno,min(empno) over(partition by deptno) mn 4 from scott.emp 5 order by empno 6 ) 7 order by mn,deptno,empno; EMPNO DEPTNO MN ---------- ---------- ---------- 7369 20 7369 7566 20 7369 7788 20 7369 7876 20 7369 7902 20 7369 7499 30 7499 7521 30 7499 7654 30 7499 7698 30 7499 7844 30 7499 7900 30 7499 7782 10 7782 7839 10 7782 7934 10 7782 14 rows selected.Published by: JAC on April 3, 2012 19:40
Maybe you are looking for
-
HP Pavilion Notebook PC Internet questions G6
Hi im having problems with internet on my laptop HP Pavilion G6, internet keeps dropping out and showing the yellow warning triangle. Internet still works fine on my I-Phone and a game console, so I think it's the laptop not the hub. After awhile the
-
I just installed the update and now my battery indicator does not work. This shows only one question mark.
-
Hello I am trying to write a code that reads data from a spreadsheet file, which has several lines. The recorded data have formatting that looks something like: Test series | Data1 | Data2. Data3. ..... SN1 | ## | ## | ## |....... SN2 | #
-
cannot pair mobile mouse wireless Microsoft 6000 with a Toshiba bluetooth usb adapter
I have a toshiba bluetooth usb adapter, which is supposed to be able to connect with up to 7 bluetooth devices, but I can't seem to do recognize/find my Microsoft 6000 wireless mobile mouse. is it because the mouse has its own transceiver or I do so
-
Software BlackBerry made Blackberry connection problems with Outlook 2003?
I tried to look through the forums to see if theres any other mention of this but could not find something but it definitely seems to be a problem with one of our PC My wife has a Win XP SP3 system and running Office 2003 and 2003 Ourlook which, unti