Question

maybe my description is bit misty:)
i want to do outer join on two tables, and select records where one field has some value or is null
my original concept was

select A.x,B.y 
from A 
left outer join B 
    on A.id= B.a_id 
where b.y ='abc' 
    or b.y is null

but then i realized it’s taking B.y from B table not from joined
is it any easy fix how i can do it?

what i need is selecting rows, where B.y is ‘abc’ or null, ie :
(1,’abc’)
(2,null)

while my query gives me functionality of inner join with result

(1,’abc’)
ignoring other entry

Answer 1

Is it

select A.x,B.y from A left outer join B on A.id= B.a_id and ( b.y ='abc' or b.y is null )

After reading comments just remove left outer