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imughal
Posting Yak Master
192 Posts |
 Posted - 2009-09-18 : 02:48:11
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| Hi,i have table with more than 5000000 records, table has 20 coulmn. when i run select * from mytable it took more than 5 min to execute on query analyzer.is there anyway to optimize the performance and cut down execution time.thx |
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webfred
Master Smack Fu Yak Hacker
8781 Posts |
Posted - 2009-09-18 : 03:11:32
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Yes that's easy.Don't use *. Use only needed columns.Use WHERE clause to filter the data because I think you don't wanna read 5000000 rows...
No, you're never too old to Yak'n'Roll if you're too young to die. |
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Peter99
Constraint Violating Yak Guru
498 Posts |
Posted - 2009-09-18 : 12:32:26
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| also create index on column which you will use in where clause. |
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query execution took more time