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Execution plan analysis
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09/09/2006 22:00:24
 
 
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Forum:
Microsoft SQL Server
Catégorie:
Autre
Titre:
Execution plan analysis
Divers
Thread ID:
01152614
Message ID:
01152614
Vues:
72
Hi,
I am new to execution plan.
I have 2 execution plans as below. Which is more preferable?

Thank you
  |--Nested Loops(Inner Join, OUTER REFERENCES:([Bmk1002]))
       |--Nested Loops(Inner Join, OUTER REFERENCES:([d].[CCYCLE]))
       |    |--Index Seek(OBJECT:([lumelids].[dbo].[DPAYRSLT].[IX_DPAYRSLT] AS [d]), SEEK:([d].[CNOEE]='1023' AND [d].[CPERIOD]='200601') ORDERED FORWARD)  && 33%
       |    |--Index Seek(OBJECT:([lumelids].[dbo].[dpaydtl].[IX_dpaydtl] AS [p]), SEEK:([p].[CNOEE]='1023' AND [p].[CPERIOD]='200601' AND [p].[CCYCLE]=[lumelids].[dbo].[DPAYRSLT].[CCYCLE] as [d].[CCYCLE]) ORDERED FORWARD)  && 33%
       |--RID Lookup(OBJECT:([lumelids].[dbo].[dpaydtl] AS [p]), SEEK:([Bmk1002]=[Bmk1002]) LOOKUP ORDERED FORWARD)  && 33%
  |--Hash Match(Inner Join, HASH:([Expr1005])=([Expr1006]), RESIDUAL:([Expr1005]=[Expr1006]))
       |--Compute Scalar(DEFINE:([Expr1005]=(([lumelids].[dbo].[DPAYRSLT].[CNOEE] as [d].[CNOEE]+[lumelids].[dbo].[DPAYRSLT].[CPERIOD] as [d].[CPERIOD])+[lumelids].[dbo].[DPAYRSLT].[CCYCLE] as [d].[CCYCLE])+[lumelids].[dbo].[DPAYRSLT].[CCOMPANY] as [d].[CCOMPANY]))
       |    |--Index Seek(OBJECT:([lumelids].[dbo].[DPAYRSLT].[IX_DPAYRSLT] AS [d]), SEEK:([d].[CNOEE]='1023' AND [d].[CPERIOD]='200601') ORDERED FORWARD)  &&4%
       |--Compute Scalar(DEFINE:([Expr1006]=(([lumelids].[dbo].[dpaydtl].[CNOEE] as [p].[CNOEE]+[lumelids].[dbo].[dpaydtl].[CPERIOD] as [p].[CPERIOD])+[lumelids].[dbo].[dpaydtl].[CCYCLE] as [p].[CCYCLE])+[lumelids].[dbo].[dpaydtl].[CCOMPANY] as [p].[CCOMPANY]))
            |--Table Scan(OBJECT:([lumelids].[dbo].[dpaydtl] AS [p]))  && 60%
I am not the most powerful man in this world.
I am not the worst man in this world either.
I just as same as all of you.
I still need to learn from my mistakes...
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