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iamsmahd
Yak Posting Veteran
55 Posts |
 Posted - 2005-07-20 : 06:06:51
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| Hi there.I have a user-defined function (dbo.fn_StudCount) which wanna to use it within a select statement.when I run my query without the function it returns result set very fast (in query analyzer) but as I run my query with the function it slows very down ! :======my query without the function======select x,y,zfrom table1,....==============================================my query with the function==========select x,y,dbo.fn_StudCount(x) as scfrom table1,....=========================================now how can I improve my query ?what is your idea?thank you very muchsonia |
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spirit1
Cybernetic Yak Master
11752 Posts |
Posted - 2005-07-20 : 06:19:15
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what does your function do?if it's a complex function of course it will slow the query down.functions execute for each row. so if you have 100.000 rows it wil execute 100.000 times.Go with the flow & have fun! Else fight the flow  |
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iamsmahd
Yak Posting Veteran
55 Posts |
Posted - 2005-07-21 : 06:09:23
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| Dear Friend,my function is a computational one and hasn't got a complex process.So what is your solution?Do you have any opinion for improving the select statement?Thanks in advance....sonia |
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iamsmahd
Yak Posting Veteran
55 Posts |
Posted - 2005-07-21 : 06:13:53
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| Dear Friend,my function is a computational one and hasn't got a complex process.So what is your solution?Do you have any opinion for improving the select statement?Thanks in advance....sonia |
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spirit1
Cybernetic Yak Master
11752 Posts |
Posted - 2005-07-21 : 06:19:00
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| this tells me nothing...show us the function.Go with the flow & have fun! Else fight the flow |
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calling a user-defined function in a query