Question

I have two tables like this
table1

Unix     |    Staffid
_____________________
534      |     65
342      |     34
232      |     232
232      |     34

table2

Staffid   |    auth
____________________
65        |  y
34        |  y
78        |  n
45        |  y

LIke this..
I have to select those staffid having auth y And which is not at this particular unix.. for example at particular unix 232 I can select 65 but not 34…I need for all unix values.

Answer 1

I have a slightly different interpretation of the question:

SELECT DISTINCT t1.Unix, t2.Staffid
FROM table1 t1, table2 t2
WHERE t2.auth = 'Y'
    AND t2.Staffid NOT IN (select Staffid FROM table1 WHERE Unix = t1.Unix)
    ORDER BY t1.Unix;