Can you optimize this sql?

Hi,
I believe that this sql can be improved, but honestly i don't know how.
               Select * From Ctb_Mov m Where m.CodEmp = 1 and m.Plano='G' and
               Cg Between '211' and '211'
               and cx between '1' and '9999999'
               and (M.GRUPO is NULL or
              M.GRUPO in (select m1.GRUPO
                                    from ctb_mov M1
                                    where M1.CODEMP = m.codemp and
                                              M1.PLANO = m.plano and
                                              M1.cg = M.cg and
                                              M1.cx = M.cx and
                                              M1.GRUPO = M.GRUPO and
                                              M1.datamov <= to_date('17092009','ddmmyyyy') and
                                              M1.GRUPO <> 9999999
                                    group by M1.CODEMP, M1.PLANO, M1.cg,
                                                  M1.CX, M1.GRUPO
                                    having sum(M1.VLD - M1.VLC) <> 0))
Suggestions?
Regards
Jomar

[HOW TO: Post a SQL statement tuning request - template posting |http://forums.oracle.com/forums/thread.jspa?threadID=863295&tstart=0]
This thread will give a good insight on how to ask a performance tuning question in this forum. Following that will get you good answers!!

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How can i optimize this SQL

Is there anyway i could optimize the below mentioned SQL. Since our test DB is down now, i'll be posting the EXPLAIN PLAN later.
Is there anything i could do syntactically to optimize this sql?
SELECT SUBSTR(STK_INF.TASK_GENRTN_REF_NBR,1,12) AS PICK_WAVE_NBR,
                 ( CASE WHEN ( SUM(STK_INF.QTY_ALLOC) > 0 ) THEN
        ROUND ( (SUM(CASE WHEN (STK_INF.NEXT_TASK_ID = 0 AND STK_INF.ALLOC_INVN_DTL_ID = 0) THEN
        STK_INF.QTY_ALLOC ELSE 0 END ) / (SUM(STK_INF.QTY_ALLOC))),2 ) * 100
        ELSE 0 END ) AS PICK_PER,
     ( CASE WHEN ( SUM(STK_INF.QTY_ALLOC) > 0 ) THEN
       ROUND( (SUM(CASE WHEN (STK_INF.NEXT_TASK_ID = 0 AND STK_INF.ALLOC_INVN_DTL_ID = 0) THEN
       STK_INF.QTY_PULLD ELSE 0 END ) / (SUM(STK_INF.QTY_ALLOC))),2 ) * 100
       ELSE 0 END ) AS TILT_PERCENT
     FROM STK_INF, TRK_DTL
     WHERE STK_INF.TASK_GENRTN_REF_CODE = '44' AND STK_INF.CARTON_NBR IS NOT NULL
      AND ((STK_INF.NEXT_TASK_ID = 0 AND STK_INF.STAT_CODE <= 90) OR (STK_INF.NEXT_TASK_ID > 0 AND STK_INF.STAT_CODE < 99))
      AND PULL_LOCN_ID = TRK_DTL.LOCN_ID(+) AND (TRK_DTL.AREA <>'C' OR TRK_DTL.AREA IS NULL)
     GROUP BY SUBSTR(STK_INF.TASK_GENRTN_REF_NBR,1,12)

This is the EXPLAIN PLAIN i got after i issued EXECUTE DBMS_STATS.GATHER_TABLE_STATS ('schema_name','table_name'); for both the tables involved.
The number of row returned is still 222 rows. But in the EXPLAIN PLAN it is shown as 3060 !!
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 3267659036
| Id | Operation               | Name     | Rows | Bytes |TempSpc| Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT        |          | 3060 |   194K|       | 16527 (10)| 00:03:19 |
|   1 | HASH GROUP BY          |          | 3060 |   194K|       | 16527 (10)| 00:03:19 |
|* 2 |   FILTER                |          |       |       |       |            |          |
|* 3 |    HASH JOIN RIGHT OUTER|          |   177K|    11M| 7344K| 16397 (10)| 00:03:17 |
|   4 |     TABLE ACCESS FULL   | TRK_DTL |   313K| 3669K|       | 2378   (6)| 00:00:29 |
|* 5 |     TABLE ACCESS FULL   | STK_INF |   177K| 9205K|       | 13030 (11)| 00:02:37 |
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
   2 - filter("TRK_DTL"."AREA"<>'C' OR "TRK_DTL"."AREA" IS NULL)
   3 - access("PULL_LOCN_ID"="TRK_DTL"."LOCN_ID"(+))
   5 - filter("STK_INF"."CARTON_NBR" IS NOT NULL AND
              "STK_INF"."TASK_GENRTN_REF_CODE"='44' AND ("STK_INF"."NEXT_TASK_ID"=0 AND
              "STK_INF"."STAT_CODE"<=90 OR "STK_INF"."NEXT_TASK_ID">0 AND
              "STK_INF"."STAT_CODE"<99))
22 rows selected.You mentioned about creating indexes in STK_INF table. STK_INF.NEXT_TASK_ID has 186385 distinct values out of a total 782087. Does NEXT_TASK_ID make a good candidate for a B-Tree index
STK_INF.STAT_CODE has only four distinct values, would this make a good candidate for a Bitmap index?

Can You Explain This SQL Query - Inline View Included

The query is taken from "Oracle Database 10g: SQL Fundamentals II" page 3-7 (chapter 3)
I do not fully understand the following query:
SELECT a.last_name, a.salary, a.department_id, b.salavg
FROM   employees a, (SELECT   department_id,
AVG(salary) salavg
FROM     employees
GROUP BY department_id) b
WHERE a.department_id = b.department_id
AND    a.salary > b.salavg;
The inline view can return several records. Can you please tell me in step by step how does this work. I understand the concept of join tables and aliases, etc. I just need to know the mechanism of this code.
Thanks

user11164565 wrote:
The query is taken from "Oracle Database 10g: SQL Fundamentals II" page 3-7 (chapter 3)
I do not fully understand the following query:
SELECT a.last_name, a.salary, a.department_id, b.salavg
FROM   employees a, (SELECT   department_id,
AVG(salary) salavg
FROM     employees
GROUP BY department_id) b
WHERE a.department_id = b.department_id
AND    a.salary > b.salavg;
The inline view can return several records. Can you please tell me in step by step how does this work. I understand the concept of join tables and aliases, etc. I just need to know the mechanism of this code.
The query is returning the last name, salary , department and average salary of all the departments where salary is greater than the average salary.
HTH
Aman....

Can you optimize this code with bit shifting?

Hi there,
I was wondering if anyone could make this code run faster, by implementing bitshifting techniques. I'd really appreciate it, and thanks!
    public void scaleImage(Image source, Image dest) {
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        int sourceHeight = source.getHeight();
        int thumbWidth = dest.getWidth();
        int thumbHeight = dest.getHeight();
        Graphics g = dest.getGraphics();
        int dx, dy = 0;
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                dy = y * sourceHeight / thumbHeight;
                g.drawImage(source, x - dx, y - dy, Graphics.LEFT | Graphics.TOP);
    }Message was edited by:
conlanrios

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http://www.java-tips.org/java-me-tips/midp/displaying-images-as-thumbnails-on-j2me-devices.html
you can have a look to this article:
http://developers.sun.com/techtopics/mobility/reference/techart/design_guidelines/image_resizing.html

I don't know how I can optimize this SQL

Dear ALL:
I don't know how I can optimize this SQL.
Is it possible to make a better SQL or PL/SQL?
Please let me know your good thought.
Thank you.
Sincerely,
===========================================================
(SELECT     A, B, C, SUM(D) as D, AVG(E) as E
FROM      T1, T2
WHERE     T1.timestamp BETWEEN TO_DATE('00:00:00','HH24:MI:SS')
AND TO_DATE('01:00:00','HH24:MI:SS')
GROUP BY A, B, C
UNION ALL
(SELECT     A, B, C, SUM(D) as D, AVG(E) as E
FROM      T1, T2
WHERE     T1.timestamp BETWEEN TO_DATE('01:00:01','HH24:MI:SS')
AND TO_DATE('02:00:00','HH24:MI:SS')
GROUP BY A, B, C
UNION ALL
(SELECT     A, B, C, SUM(D) as D, AVG(E) as E
FROM      T1, T2
WHERE     T1.timestamp BETWEEN TO_DATE('02:00:01','HH24:MI:SS')
AND TO_DATE('03:00:00','HH24:MI:SS')
GROUP BY A, B, C
UNION ALL
(SELECT     A, B, C, SUM(D) as D, AVG(E) as E
FROM      T1, T2
WHERE     T1.timestamp BETWEEN TO_DATE('03:00:01','HH24:MI:SS')
AND TO_DATE('04:00:00','HH24:MI:SS')
GROUP BY A, B, C
ORDER BY A ASC, B ASC, C ASC
===========================================================

Dear Warren:
Actually, for this query, it takes a few second to complete the query.
But, I have to create several time period and I have to optimize the SQL.
Time period is 1 hour, 30 min, 15 min, 5 min.
That is,
===========================================================
WHERE T1.timstamp BETWEEN TO_DATE('00:00:00','HH24:MI:SS')
AND TO_DATE('01:00:00','HH24:MI:SS')
UNION ALL
WHERE T1.timestamp BETWEEN TO_DATE('23:00:01','HH24:MI:SS')
AND TO_DATE('24:00:00','HH24:MI:SS')
===========================================================
WHERE T1.timstamp BETWEEN TO_DATE('00:00:00','HH24:MI:SS')
AND TO_DATE('00:30:00','HH24:MI:SS')
UNION ALL
WHERE T1.timestamp BETWEEN TO_DATE('23:30:01','HH24:MI:SS')
AND TO_DATE('24:00:00','HH24:MI:SS')
===========================================================
WHERE T1.timstamp BETWEEN TO_DATE('00:00:00','HH24:MI:SS')
AND TO_DATE('00:15:00','HH24:MI:SS')
UNION ALL
WHERE T1.timestamp BETWEEN TO_DATE('23:45:01','HH24:MI:SS')
AND TO_DATE('24:00:00','HH24:MI:SS')
===========================================================
WHERE T1.timstamp BETWEEN TO_DATE('00:00:00','HH24:MI:SS')
AND TO_DATE('00:05:00','HH24:MI:SS')
UNION ALL
WHERE T1.timestamp BETWEEN TO_DATE('23:55:01','HH24:MI:SS')
AND TO_DATE('24:00:00','HH24:MI:SS')
===========================================================
Do you know how this SQL is optimized?
Thank you,

Can anyone tell me how can i optimize this query...

Can anyone tell me how can i optimize this query ??? :
Select Distinct eopersona.numident From rscompeten , rscompet , rscv , eopersona , rscurso , rseduca , rsexplab , rsinteres
Where ( ( (LOWER (rscompeten.nombre LIKE '%caracas%') AND ( rscompeten.id = rscompet.idcompeten ) AND ( rscv.id = rscompet.idcv ) AND ( eopersona.id = rscv.idpersona ) )
OR ( (LOWER (rscurso.nombre) LIKE '%caracas%') AND ( rscv.id = rscurso.idcv ) AND ( eopersona.id = rscv.idpersona ) )
OR ( (LOWER (rscurso.lugar) LIKE '%caracas%') AND ( rscv.id = rscurso.idcv ) AND ( eopersona.id = rscv.idpersona ) )
OR ( (LOWER (rseduca.univinst) LIKE '%caracas%)' AND ( rscv.id = rseduca.idcv ) AND ( eopersona.id = rscv.idpersona ) )
OR ( (LOWER (rsexplab.nombempre) LIKE '%caracas%' AND ( rscv.id = rsexplab.idcv ) AND ( eopersona.id = rscv.idpersona ) )
OR ( (LOWER (rsinteres.descrip) LIKE '%caracas%' AND ( rscv.id = rsinteres.idcv ) AND ( eopersona.id = rscv.idpersona ) )
OR ( (LOWER (rscv.cargoasp) LIKE '%caracas%' AND ( eopersona.id = rscv.idpersona ) )
OR ( LOWER (eopersona.ciudad) LIKE '%caracas%' AND ( eopersona.id = rscv.idpersona )
PLEASE IF YOU FIND SOMETHING WRONG.. PLEASE HELP ME.. this query takes me aproximatelly 10 minutes and the database is really small ( with only 200 records on each table )

You are querying eight tables, however in any of your OR predicates you're only restricting 3 or 4 of those tables. That means that the remaining 4 or 5 tables are generating cartesian products. (n.b. the cartesian product of 5 tables with 200 rows each results in g 200^5 = 320,000,000,000 rows) Then you casually hide this behind "distinct".
A simple restatement of your requirements looks like this:
Select eopersona.numident
From rscompeten,
       rscompet,
       rscv,
       eopersona
Where LOWER (rscompeten.nombre) LIKE '%caracas%'
   AND rscompeten.id = rscompet.idcompeten
   AND rscv.id = rscompet.idcv
   AND eopersona.id = rscv.idpersona
UNION
Select eopersona.numident
From rscurso ,
       rscv,
       eopersona
Where LOWER (rscurso.nombre) LIKE '%caracas%'
   AND rscv.id = rscurso.idcv
   AND eopersona.id = rscv.idpersona
UNION
Select eopersona.numident
From rscurso ,
       rscv,
       eopersona
Where LOWER (rscurso.lugar) LIKE '%caracas%'
   AND rscv.id = rscurso.idcv
   AND eopersona.id = rscv.idpersona
UNION
...From there you can eliminate redundancies as desired, but I imagine that the above will perform admirably with the data volumes you describe.

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== Issue
==
I have another kind of problem with Firefox
== Description
==
i have been trying to get the audio to play for 3 days now i did see where it had been deleted this is a used comp i haven't had it long can you fix this i'm at my wits end
== Firefox version
==
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==
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==
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Can you optimize this sql?

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