Delete all Duplicate Rows except for orginial in MySQL?

For example: my table: “sample”, “empname” column contains duplicate values.

I want to keep the first inserted rows and delete the duplicated values, the query is:

DELETE t1 FROM sample t1, sample t2 WHERE t1.id > t2.id AND t1.empname = t2.empname

About selvam4win

I am Selvam. I am very jolly person and frank one.

Posted on December 31, 2011, in MySql and tagged , , , , . Bookmark the permalink. Leave a comment.

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