Rick Ratchford wrote:
> Okay, this worked, but I have NO IDEA why.
>
> SQLString = "SELECT min(Year) FROM TmpTable " & _
> "WHERE Month=1 UNION " & _
> "SELECT max(Year) FROM TmpTable " & _
> "WHERE Month = 12 LIMIT 2"
Read about aggregate functions (min() is one of those) in your favorite
SQL textbook, then drop the LIMIT clause. You may also want to use UNION
ALL instead of UNION: otherwise, if you just have one full year's worth
of data, you'll get a single row as UNION removes duplicates.
In fact, it may be more convenient (definitely easier to reuse as a
fragment in more complicated queries) to return this result as one row
with two columns:
select
(select min(Year) ...) as firstFullYear,
(select max(Year) ...) as lastFullYear;
Igor Tandetnik
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