Hi Denham,
Suggestion 1) Perhaps you may create an index for table_1 (col1,col2) and
table_2 (col3,col4)
Suggestion 2) Try
SELECT col1,col2
FROM Table_1
WHERE (0=(select count(*) from table_2 where
col3=col1 and col4=col2))
Hope it helps.
Regds,
Catherine
-----Original Message-----
Sent: Wednesday, March 27, 2002 4:53 PM
To: Multiple recipients of list ORACLE-L
Hello List
Is there anyone who can give me a solution to this problem.
It is a sql that runs forever and I eventually have to kill it, both tables
are large 500000 + rows.
Is there perhaps a quicker more effecient way of doing this.
SELECT col1,col2
FROM Table_1
WHERE (col1,col2) NOT IN (SELECT col3,col4 FROM Table_2);
TIA
Denham Eva
Oracle DBA
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