Delete Duplicate Record In Table

Problem

 This Table (TAB_NAME) contain Duplicate Data

Col_1
1
2
1
2
3
4
1
4
3
1

  Tab_Name

And my requirement. Delete duplicate data in this table

Col_1

1

2

3

4

 Tab_name

Solution: Write this sql quary

DELETE FROM TAB_NAME
      WHERE ROWID NOT IN (  SELECT MIN (ROWID)
                              FROM TAB_NAME
                          GROUP BY COL_1);