We all must have faced to delete the duplicate entries in a table.
Here’s the simple solution to that. 
The scenario is:
The table has 3 columns, A, B, and C. Column A is unique for all rows
but the columns B and C can be duplicated across rows. Now if you need
to remove the rows where B and C are duplicated.
DELETE
FROM daTable
WHERE a NOT IN
( SELECT MIN(a)
FROM daTable
GROUP
BY b,c )
