Answer / manoj

select employee_id, count(*) from employees group by
employee_id having count(*) > 1

Answer / avik ganguly

select * from emp a where rowid = (select max(rowid) from
emp where empno = a.empno group by empno having count(*) >1)

How to create an external table.

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1 Answers   Flextronics, Hexaware, SQL Star,

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What are the constraints on severity level in raiseerror?

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