How to display all the duplicate records from the oracle
Table?
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Answer Posted / prasad
select * from Table_name where column_name in(select Column_name from table_name group by column_name having count(1)>1)
select deptno from emp where deptno in (select deptno from emp group by deptno having count(1)>1)
u will get only duplicate records
for Example:
deptno
----------
10
10
20
20
30
40
50
by using above query the o/p displays
deptno
--------------
10
10
20
20
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