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How to delete the duplicate colums in a sql table ?

Answers were Sorted based on User's Feedback



How to delete the duplicate colums in a sql table ?..

Answer / san

It's not at all possible to create duplicate columns in a
SQL table. The how can we delete the duplicate columns?

Is This Answer Correct ?    10 Yes 0 No

How to delete the duplicate colums in a sql table ?..

Answer / sathyasheelanbe

delete from tablename where rowid not in(select max(rowid)
from tablename group by primary key columnname)

Is This Answer Correct ?    2 Yes 0 No

How to delete the duplicate colums in a sql table ?..

Answer / subash

In this query the values will delete based on employee names

delete from emp a1 where rowid<(select max(rowid)from emp a2
where a1.ename = a2.ename group by a2.ename having count(1) >1);

Is This Answer Correct ?    3 Yes 4 No

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