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How can I find the duplicate rows in mysql and also make it unique.

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toomee

toomee

Technical User
Jan 28, 2003
10
TH
How can I find the duplicate rows in mysql and also make it unique.

Thanks a lot

 
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Code: 
select c1,c2 
  from t
 group by c1,c2
 having count(*) > 1

SQL has two mechanisms for avoiding duplicity, primary keys and unique constraints. Do a search in the docs at for more information.
 
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