Question

I have two identical tables such as :

table1
col1    col2    col3    col4    col5

table2
col1    col2    col3    col4    col5

I want to compare table 1 and 2 and find identical rows (col1, col2, col3, col4 etc..) between the 2 tables.

I think we need to use vtable or something similar ..

I tried

SELECT * FROM TABLE1 WHERE COL1, COL2, COL3, COL4 IN 
        (SELECT COL1, COL2, COL3, COL4 FROM TABLE2);

It doesn’t work ..
help please 🙂

Answer 1

SELECT * 
FROM TABLE1 t
WHERE EXISTS
      ( SELECT *
        FROM TABLE2 tt
        WHERE (COL1, COL2, COL3, COL4) 
            = (t.COL1, t.COL2, t.COL3, t.COL4)
      )
;