simple (I hope) SQL question

hello,
just a simple question (I hope).
I've 2 tables (say table1 and table2) both have a common column (say "cf") but the first table has in this column more values than the second (aka the first table have more records than the second).
I'd like to extract all the data of the first table whose cf values (i.e. table1.cf) are NOT present on the second table (i.e. are NOT in table2.cf)

thanks a lot for your help,
fabiano
fabiano petroneAsked:
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Shaun KlineLead Software EngineerCommented:
select *
from table1
where not exists (select 1 from table2 where cf = table1.cf)
0
GaryCommented:
SELECT * FROM table1 WHERE cf NOT IN (SELECT cf FROM table2)

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John_VidmarCommented:
SELECT	*
FROM	table1	a
LEFT
JOIN	table2	b	ON	a.cf = b.cf
WHERE	b.cf IS NULL

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fabiano petroneAuthor Commented:
Thanks to all of You,
See You,
Fabiano
0
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