How to delete duplicate rows in sql?

The duplicate rows in the SQL can be deleted in the following manner.

• The duplicate rows need to be found using the ROW_NUMBER function or GROUP by clause
• DELETE statement is then used to erase the duplicate rows in the SQL.

Duplicate rows can also be deleted from the SQL by using CTE (Common Table Expression), T-SQL and SSIS package.

Syntax to delete duplicate rows in SQL

SELECT DISTINCT column1, column2,....columnN  
FROM table _name  
WHERE [conditions]