Why this does not work?

  • 0

    Why this :"Delete from Person where Id not in (select Id from (min(Id) as Id from Person group by Email) a);"


    But this:" Delete from Person where Id not in (select min(a.Id) from Person a group by a.Email);"
    can not work.

  • 1

    In Mysql you can't modify the same table which you use in the SELECT part.

  • 0

    Thank for your answer. But the Person I put 'a' after it as another table. This can not work, either? It has to be another table which create by some constraint statements?

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