SQL Tuning Case .... When is Select /*+ FIRST_ROWS(200) */ Hint Useful ?

  • From: VIVEK_SHARMA <VIVEK_SHARMA@xxxxxxxxxxx>
  • To: ORACLE-L <oracle-l@xxxxxxxxxxxxx>, "sfaroult@xxxxxxxxxxxx" <sfaroult@xxxxxxxxxxxx>, "mwf@xxxxxxxx" <mwf@xxxxxxxx>, "tim@xxxxxxxxx" <tim@xxxxxxxxx>, Tanel Poder <tanel.poder.003@xxxxxxx>, rjamya <rjamya@xxxxxxxxx>
  • Date: Tue, 28 Oct 2008 17:41:41 +0530

Folks

When is Select /*+ FIRST_ROWS(200) */ Hint Useful ?
Following SQL needs Tuning ... Any Ideas for RE-structuring ... Should it be 
converted into a PL/SQL? ... Any Examples , Docs , Links pls?

Will provide any Data needed.

Cheers & Thanks V much

P.S.

Select /*+ FIRST_ROWS(200) */ BO24_Sales.ApplCreationDate, ..
From Opportunities BO16_Opportunities, BizCenter BO146_BizCenter, Agents 
BO3_Agents, SRMGroups BO13_SRMGroups, Opportunity_Products 
BO16_Opportunity_Products, Products BO21_Products, Sales BO24_Sales
where BO16_Opportunities.AssignedLocationID = BO146_BizCenter.BCID (+)
AND BO16_Opportunities.AssignedUserID = BO3_Agents.PersonID (+)
AND BO16_Opportunities.assignedGroupID = BO13_SRMGroups.GroupID (+)
AND BO16_Opportunity_Products.productID = BO21_Products.ProductID
AND BO16_Opportunities.OpportunityID = BO16_Opportunity_Products.jobID (+)
AND BO16_Opportunities.OpportunityID = BO24_Sales.OpportunityID (+)
AND BO16_Opportunities.bank_ID = BO13_SRMGroups.bank_ID (+)
AND BO16_Opportunity_Products.bank_ID = BO21_Products.bank_ID
AND BO16_Opportunities.bank_ID = BO16_Opportunity_Products.bank_ID (+)
AND BO16_Opportunities.bank_ID = BO24_Sales.bank_ID (+)
AND ( ( ( ( ( BO16_Opportunities.mergedWith is null ) AND ( 
BO16_Opportunities.Status in (:"SYS_B_11", :"SYS_B_12") ) ) AND ( ( ( 
BO16_Opportunities.OwnerUserID = :"SYS_B_13" ) OR ( ( 
BO16_Opportunities.AssignedUserID = :"SYS_B_14" ) OR ( 
BO16_Opportunities.SalesOwnerID = :"SYS_B_15" ) ) ) ) )
AND (rownum <=:"SYS_B_16")
AND BO16_Opportunities.BANK_ID = :"SYS_B_17" ) )

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