> In MS SQL and Access, there is the TOP clause to limit the
> number of records, but I'm not sure if and how you can set
> the first one.
SELECT BOTTOM 50 * FROM mytable
WHERE mytable_id IN
(SELECT TOP 100 mytable_id FROM mytable
ORDER BY my, column, list)
ORDER BY my, column, list
The order by clause must be the same in both the outer and sub-query.
> In Oracle, there is ROWNUM...
Yeah, but that's not how you get a set out of the middle with Oracle,
'cause if you specify a minimum value for rownum you don't get the
expected results... well... not by itself... In oracle you use the
MINUS clause, which is surprisingly efficient... but... I still don't
recommend using it, just because I advocate db independance.
SELECT * FROM mytable WHERE rownum < 100
ORDER BY my, column, list
MINUS SELECT * FROM mytable WHERE rownum > 50
ORDER BY my, column, list
.... I haven't used this recently, so I'm not certain the order by
clauses are in the right place, but that's the gist of it.
s. isaac dealey 954.522.6080
new epoch : isn't it time for a change?
add features without fixtures with
the onTap open source framework
http://www.fusiontap.com
http://coldfusion.sys-con.com/author/4806Dealey.htm
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