At 04:53 PM 3/14/2005, afan@xxxxxxxx wrote:
I have table with products. In column categories are listed numbers of
categories a product belongs, like:
1. 21,
2. 35, 8, 72, 1, 4,
3. 23, 11, 48,
4. 65,
5. 11,
6. 23,
7. ...
(somebody else created the table this way and I have to keep it for the
moment)
Now, I have to list all products that belongs to category with cat.
number, e.g. 11.
If I use query:
select * from products where categories like '11, '
product no. 5 will be listed but not product no. 3
select * from products where categories like '%11,% '
will list products 3 and 5 but
select * from products where categories like '%1,% '
will list products 2, 3 and 5 too - and, 3 & 5 are wrong.
I got from friend this solution:
select * from products where categories REGEXP '(^".$cat_num."|,
".$cat_num.")'
it works just fine if I use 2 digit cat number. e.g. 11 or 26 or 62. But
if I select for cat. num. 2 it will list all products from categories 2
and everything between 20 and 29. 32 or 62 will not be listed.
Confusing, ha?
Thanks for any help!
-afan
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get the categories in a variable. like
<?
$cat = "35, 8, 72, 1, 4,";
$cat = str_replace("," , "|" , $cat);
$cat = str_replace(" " , "\\ " , $cat);
// this will get you $cat = "35|\ 8|\ 72|\ 1|\ 4|";
$cat = rtrim($cat, "|");
// this will get you $cat = "35|\ 8|\ 72|\ 1|\ 4";
$sql = "SELECT * FROM products WHERE categories REGEXP '(" . $cat . ")'";
echo $sql;
?>
produces
SELECT * FROM products WHERE categories REGEXP '(35|\ 8|\ 72|\ 1|\ 4)'
which matches the correct items in my test data
-Dave
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