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raysefo
Constraint Violating Yak Guru
260 Posts |
 Posted - 2011-03-01 : 06:55:49
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| Hi,I want to insert into a table but I would like to check if there is same data already in the table. Is there a way to do this in a single insert statement? And I would like to know if checking for duplicates is expensive within 10000 data?thanks in advance.Best Regards |
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webfred
Master Smack Fu Yak Hacker
8781 Posts |
Posted - 2011-03-01 : 07:41:05
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No IF needed.Example:insert destinationtable(col1,col2,col3)select col,col2,col3from sourcetable t1where not exists(select * from destinationtable t2 where t1.col1 = t2.col1)
No, you're never too old to Yak'n'Roll if you're too young to die. |
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raysefo
Constraint Violating Yak Guru
260 Posts |
Posted - 2011-03-01 : 07:58:27
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| Thanks webfred for your reply, Is this too slow and waste of too much resources? |
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webfred
Master Smack Fu Yak Hacker
8781 Posts |
Posted - 2011-03-01 : 07:59:20
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No, I don't think so  Give it a try.
No, you're never too old to Yak'n'Roll if you're too young to die. |
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How to Insert by checking duplicate data