How to retrieve Duplicate Rows only in a Table?
Suppose if a Table Name is "Education". It consists of
multiple columns. Then if we insert rows into this table
with duplicate records then how can we retrieve only
duplicate records from that table?
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Answer Posted / jay k patel
SQL> select * from emp;
ENO ENAME DOJ DESGN ADDRESS BSAL
---------- ------- --------- ------- ------- ----------
1 jay 04-JAN-80 md vapi 50000
2 vijay 04-FEB-75 manager vapi 7000
1 ajay 12-JAN-77 dba vapi 9000
3 rajay 05-MAR-70 cleark vapi 5000
4 sujay 28-JAN-73 dba vapi 6000
5 jayesh 07-APR-74 cleark vapi 8000
7 jaymin 04-JAN-62 analyst vapi 4000
6 jaynis 10-MAY-69 dba vapi 9000
1 jayur 04-JAN-74 manager vapi 4000
12 jaynil 14-DEC-71 cleark vapi 2000
10 rows selected.
SQL> SELECT desgn , count(*)
2 FROM emp
3 GROUP BY Desgn
4 Having count(*) > 1 ;
DESGN COUNT(*)
------- ----------
cleark 3
dba 3
manager 2
SQL>
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