Hi,
This is a bit unclear - any sorting is either based on some combination of
values, be they columns, bits of columns, static values or random values,
and so can be expressed as an Order BY clause.
For example, I have a report that allows the user to say in which order the
columns should be sorted, and create an order by clause (in 'C') from their
selections.
Are you able to clarify things a bit further?
Quentin
-----Original Message-----
From: Michael Todd Glazier [mailto:[EMAIL PROTECTED]]
Sent: Friday, 23 March 2001 8:31 a.m.
To: [EMAIL PROTECTED]
Subject: Dynamic Custom Sort Orders
hey all! I'm developing a CGI app for access to a mysql table. I want
to offer users the ability to arbitrarily sort the results. That is,
given the following table:
letter
-----
A
B
C
I want to sort the results as B,C,A , C,A,B, and such. I need to do
this from a single select statement so I can use the LIMIT parameter
to keep state and page through the results.
The best solution I've come up with so far is to dynamically build an
IF statement like the following. Assume the requested order is C, A, B
SELECT letter, IF(letter='C',1,IF(letter='A',2,IF(letter='B',3,4)))
as MYORDER FROM alpha ORDER BY MYORDER
This works, but it seems a tad clumsy. Also, the real table and sort
order uses and combines multiple columns, so it gets really hairy.
How to use formulas to affect sort order in the ORDER BY clause isn't
clear to me (other than RAND()), so I'm wondering if a cleaner
solution lies there.
Any thoughts would be appreciated
Peace,
Michael Todd
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