google 'cross tab queries'...there is a php/mysql example (sorry travelling
and don't have the link) on who to create a cross table query which is what
you are looking for
Bastien
From: "Blanton, Bob" <BlantonB@xxxxxxxxxxxxx>
To:
<tg-php@xxxxxxxxxxxxxxxxxxxxxx>,<php-db@xxxxxxxxxxxxx>,<myainab@xxxxxxxxx>
Subject: RE: Select distinct field won't return distinct value
Date: Tue, 6 Jun 2006 23:44:22 -0400
I'm just learning MySQL so don't know all the syntax. There is a "LIST"
function in Sybase Adaptive Server Anywhere which would do that. Is
there an equivalent function in MySQL?
Query:
SELECT distinct niin, list(serial_number) FROM
fmds.maintenance_equipment
group by niin
order by niin
Output:
niin list(serial_number)
000213909 B71-11649,B71-11657,B71-11650
000473750 BAF-3750-0001,BAF-3750-0002,BAF-3750-0003
000929062 2341
001139768 2207
-----Original Message-----
From: tg-php@xxxxxxxxxxxxxxxxxxxxxx
[mailto:tg-php@xxxxxxxxxxxxxxxxxxxxxx]
Sent: Tuesday, June 06, 2006 7:48 PM
To: php-db@xxxxxxxxxxxxx
Cc: myainab@xxxxxxxxx
Subject: Re: Select distinct field won't return distinct value
Correct me if I'm wrong, but it sounds like you have something like
this:
123 Joe
124 Joe
125 Sue
126 John
127 Joe
128 Frank
129 Sue
And you want to output something like:
Joe 123, 124, 127
Sue 125, 129
John 126
Frank 128
But what you're getting is:
Joe 123
Joe 124
..etc
You have two ways you can solve this:
1. Do two SQL queries:
SELECT DISTINCT cus_name FROM customers
while ($result) { // forgive the pseudo-code
SELECT cus_id FROM customers WHERE cus_name = $result['cus_name']
while ($result2) {
echo $output;
}
}
Or..
2. Collect data into an array and process 'distinctness' on output
SELECT cus_name, cus_id FROM customers
while ($result) {
$cus_arr[$cus_name][] = $cus_id;
}
foreach ($cus_arr as $cus_name => $cus_idarr) {
echo "$cus_name as ids:" . implode(", ", $cusidarr) . "<br>\n";
}
There may be some tricky ways in SQL to get the data the way you want
it, but ultimately it's not worth the bending over backwards for (do I
remember right that you can do it with crosstab queries? don't even
know if MySQL will do those properly). Easier just to do it with one
of the methods above.
Good luck!
-TG
= = = Original message = = =
I want select distinct field and return value of that field, but I have
problem which is: select distinct returns duplicate value. eg, I wan
select
distinct customer name and id from the customer table. one customer may
have
different cus_ids since cus_ids are auto increment and depend on the
purchased items. so what I want is to select distinct customer name so
that
I can print customer name and customer id once.
here is algorithm;
select distinct cus_name, cus_id from customers order by cus_name asc
While row is not empty do
echo"<a href=\"page?cus=cus_id\">costomer name</a><br />";
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