Question

Is there any way to remove the matching rows from MySQL join Query.
Actually I have two tables where I have store the pub_id, and post_id in both tables these are common.
I want a result when I query all the matching rows from table1 and table2 should not be listed and the non-matching rows should be listed only.

Answer 1

Query return rows which exists only in one of two tables:

SELECT *
FROM Table1 t1
WHERE NOT EXISTS (Select 1 from Table2 t2 
                 Where t1.pub_id = t2.pub_id
                AND t1.post_Id = t2.post_id)
UNION ALL
SELECT *
FROM Table2 t1
WHERE NOT EXISTS (Select 1 from Table1 t2 
                 Where t1.pub_id = t2.pub_id
                AND t1.post_Id = t2.post_id)