Re: Left Join 3 tables

On Wednesday 14 May 2003 18:35 in
<27ad91d2.0305140935.4fdec226@posting.google.com>, Hunter
(dave_h4@yahoo.com) wrote:

> 4) I need my query to:
>   a) count all rows where cust_id is in table A but *not* in table B
> AND *not* in table C

SELECT COUNT(*) FROM A  WHERE NOT EXISTS(SELECT 1 FROM B WHERE B.cust_id = A.cust_id)    AND NOT EXISTS(SELECT 1 FROM C
WHEREC.cust_id = A.cust_id);
 

>   b) display all emails where cust_id is in table A but *not* in table
> B AND *not* in table C

SELECT A.email FROM A  WHERE NOT EXISTS(SELECT 1 FROM B WHERE B.cust_id = A.cust_id)    AND NOT EXISTS(SELECT 1 FROM C
WHEREC.cust_id = A.cust_id);
 

-- 
Regards,

Dave
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dwnoon@spamtrap.ntlworld.com (David W Noon)
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