Re: SQL Dummy Needs Help

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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