SQL Server - Need Join but where NOT Equal To [closed]

Answer 1

If you want to get values from both tables, you can use full outer join and take records which have one side as null:

select a.*, b.* from tableA a
full outer join tableB b on a.col = b.col
where a.col is null or b.col is null

Obviously this way all the values for either one table or the other will be null.

Answer 2

You probably are looking for an outer join or an outer excluding join.

OUTER JOIN

SELECT *
FROM tableA a
FULL OUTER JOIN tableB b
    ON a.column = b.column

OUTER EXCLUDING JOIN

SELECT *
FROM tableA a
FULL OUTER JOIN tableB b
    ON a.column = a.column
WHERE a.column IS NULL OR b.column IS NULL

The graphs in this answer are taken from this very useful article.