|
Hi,
I have two identical tables
table1 (f1,f2,f3,f4 primary key
(f1,f2,f3,f4))
table2 (g1,g2,g3,g4 primary key
(g1,g2,g3,g4))
How can I find the difference between the two
tables?
table1 has 10000 records
table2 has 9900 records (these records are in
table1 as well)
I'd like to find 100 missing records.
I have try this query
select f1,f2,f3,f4 from table1 where (f1,f2,f3,f4)
NOT IN (select f1,f2,f3,f4 from table2)
but it seems not work (as I want). It returns me no
records. If I use the IN clause it returns me all 10000 table1
records.
Thanks in advance
Stefano |
