Question

I have a following table

------------
id name
------------
1  master
2  datagrid 
3  zewa
4  leumas
5  delta
6  master
7  master
8  master
9  delta

I just want to remove duplicate (repeating) rows. So from the above table, all the rows for “master” and “delta” should be removed.

Note: I don’t want to use temporary table or any Alter statement. I just want to use a Delete query

Answer 1

IIRC MySQL does not allow you to reference the mutating table in an IN clause except by adding an additional layer of indirection.

DELETE FROM YourTable
WHERE  name IN (SELECT name
                FROM   (SELECT name
                        FROM   YourTable
                        GROUP  BY name
                        HAVING COUNT(name) > 1) AS T)