Delete duplicate rows from a table without primary key by using a single query

Delete duplicate rows from a table without primary key by
using a single query
Table Employee
empname salary
A 200
B 300
A 200
C 400
D 500
D 500

Output should be

A 200
B 300
C 400
D 500

Question Posted / ayanb1302@yahoo.com

14 Answers
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Delete duplicate rows from a table without primary key by using a single query Table Employee em..

Answer / b.v.rajaram

delete top (select count(*)-(select count(distinct empname )
from Employee) from Employee)from Employee
where a in (select distinct a from Employee)

Is This Answer Correct ?

0 Yes

1 No

Delete duplicate rows from a table without primary key by using a single query Table Employee em..

Answer / v.krishnakumar

using the keyword distinct we can avoid the duplicate value
in our table,(ex) SELECT DISTINCT empname FROM Employee

Is This Answer Correct ?

0 Yes

1 No

Delete duplicate rows from a table without primary key by using a single query Table Employee em..

Answer / arijit mandal

DELETE FROM Employee a
WHERE ROW_NUMBER() <>
( SELECT MIN( ROW_NUMBER() )
FROM Employee b
WHERE a.empname = b.empname
AND a.salary = b.salary)

Is This Answer Correct ?

0 Yes

2 No

Delete duplicate rows from a table without primary key by using a single query Table Employee em..

Answer / jansi rani

SELECT EMPNAME,SAL FROM EMP GROUP BY EMPNAME,SAL

Is This Answer Correct ?

0 Yes

4 No

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