Well, you should probably get yourself a good SQL book :) but here's a try
(untested). How about something like:
SELECT DISTINCT title_no, paidto_date
FROM table1, table2
WHERE table1.title_no = table2.title_no
AND table1.effect_date <> table2.paidto_date;
Again, untested - try it and see.
----------------------------------------------------------------------
Andrew J Perrin - Ph.D. Candidate, UC Berkeley, Dept. of Sociology
(Soon: Asst Professor of Sociology, U of North Carolina, Chapel Hill)
andrew_perrin@unc.edu - http://www.unc.edu/~aperrin
On Fri, 9 Mar 2001, Alder wrote:
> I'm pretty new to SQL and can't figure out how to write what should be a
> simple query of two tables. Could someone here possibly help me out?
>
> Table 1 has two fields I'm interested in: TITLE_NO and EFFECT_DATE
> Table 2 also has two fields of interest: TITLE_NO and PAIDTO_DATE
>
> TITLE_NO is unique in Table 1, meaning each TITLE will have a unique
> EFFECT_DATE. Table 2 represents an accounting history of each TITLE, so for
> each TITLE_NO there may be one or more PAIDTO_DATE values. In both Tables
> the _DATE fields are stored as 9-character strings in the fomat YYYYMMDD.
> In all cases, the MM and DD values in Table 2 should be identical with those
> in Table 1.
>
> My intention is to produce a list that will contain the TITLE_NO of each
> TITLE where the MMDD value for EFFECT_DATE differ from any of the
> PAIDTO_DATE values for that TITLE_NO. The list must contain ONLY the
> PAIDTO_DATE values that differ, and the corresponding TITLE_NO.
>
> Sorry I can't explain this a little more technically, but if anyone can
> advise me, that would be fabulous.
>
> Thanks,
> Terry
>
>
>
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