How to delete the duplicate colums in a sql table ?
Answers were Sorted based on User's Feedback
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 |
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 |
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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