Question

I have three SQL tables: TableA, TableB, and TableC

TableA is a primary key table with foreign keys in TableB and TableC (i.e. TableA is connected to TableB and TableC separately).

Example:

TableA: tableA_id
TableB: tableB_id, tableA_id
TableC: tableC_id, tableA_id

I want to return records from tableA, which matches with the record in tableB (inner join), but returned records are not in tableC. Can this be done with a single SQL statement?

Thanks.

Answer 1

select a.x, b.y
from tablea a
inner join tableb b on a.x = b.x
where not exists (select null 
                  from tablec c 
                  where a.x = c.x)