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From:Paul DuBois Date:May 30 2001 3:14pm
Subject:Re: SELECT question.
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At 9:41 AM -0700 5/30/01, Richard Reina wrote:
>I am stuck on a select query and was wondering if someone could help.  I
>have I've written a database app. that helps me run my business
>(trucking).  I need however to write a query that shows me all of the
>loads that are delivered but not billed (invoiced).  Which means that I
>have to select the loads that are delivered but do not have an entry in
>the INVOICED table -- since an entry is made in the INVOICED table
>whenever a load is billed.
>
>I know the query below won't work.  Can someone please help me fix it?
>
>SELECT l.load_no l.date FROM loads l, invoiced i
>WHERE l.dlvr_date > 0
>AND l.load_no != i.load_no

This is a job for LEFT JOIN.

SELECT l.load_no, l.date
FROM loads l LEFT JOIN invoiced i ON l.load_no = i.load_no
WHERE i.load_no IS NULL

>
>
>Thanks,
>
>Richard


-- 
Paul DuBois, paul@stripped
Thread
SELECT question.Richard Reina30 May
  • Re: SELECT question.Rafal Jank30 May
  • RE: SELECT question.Ravi Raman30 May
  • Re: SELECT question.Mohammad Shoja30 May
  • Re: SELECT question.Paul DuBois30 May
    • Re: SELECT question.Scott Alexander31 May
RE: SELECT question.Gregert Johnson30 May
Re: SELECT question.Richard Reina30 May