Ways to Find and Deleting Dupliacte records IN SQL SERVER
I have solution here...
Consider table emp
Column: ID,C1,C2
1) WE ARE CONSIDER IF ID AS IDENTITY COLUMN
2) USING ROW_NUMBER()
Consider table emp
Column: ID,name
3)USING CTE
I have solution here...
Consider table emp
Column: ID,C1,C2
1) WE ARE CONSIDER IF ID AS IDENTITY COLUMN
Code:
DELETE FROM EMP WHERE ID NOT IN (SELECT MAX(ID) FROM EMP GROUP BY C1 ,C2)
2) USING ROW_NUMBER()
Consider table emp
Column: ID,name
Code:
DELETE EMP_T FROM (SELECT ROW_NUMBER() OVER PARTATION BY (ID,NAME) ORDER BY ID) AS ROWID FROM EMP) EMP_T WHERE EMP_T.ROWID >1
3)USING CTE
Code:
WITH CTE AS { SELECT ID,NAME , ROW_NUMBER() OVER (PARTATION BY ID,NAME )AS RANK FROM EMP) } DELTE FROM CTE WHERE RANK>1
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