Comparing Many To Many Fields

Question

Hello,
I basically have two tables, each table has three fields. I want to be able to select any field = to any field.
So if table 1 has fields A, B, C and table 2 has D, E, F.
A can match to D
A can match to E
A can match to F
B can match to D
B can match to E
B can match to F
C can match to D
C can match to E
C can match to F
any ideas on how I can find these matches with one select statement? Its ALOT of rows and and I would prefer to not have 9 table scans.

Answer 1

You can do using ANY clause or IN clause
SELECT A.*, b.*
  FROM table1 A, table2 b
WHERE (A.col1 = ANY (b.col1, b.col2, b.col3)
     OR  A.col2 = ANY (b.col1, b.col2, b.col3)
     OR  A.col3 = ANY (b.col1, b.col2, b.col3))
OR
SELECT A.*, b.*
  FROM table1 A, table2 b
WHERE (A.col1 IN (b.col1, b.col2, b.col3)
     OR  A.col2 IN (b.col1, b.col2, b.col3)
     OR  A.col3 IN (b.col1, b.col2, b.col3))G.