SELECT question
| From: | Nicholas W. Miller | Date: | Thu, 17 May 2001 01:06:56 +0000 |
| Subject: | SELECT question | ||
| Groups: | php.db | ||
| Request: | Send a blank email to php-db+get-9388@lists.php.net to get a copy of this message | ||
Hi All,
I'm building a standard shopping cart style e-commerce site using PHP and MySQL running on Apache.
I store my users' cart info in this table:
+------------+--------------+------+-----+---------+-------+ |
| Field | Type | Null | Key | Default | Extra | + +------------+--------------+------+-----+---------+-------+ | | custId | int(11) | | | 0 | | | | itemId | int(11) | YES | | NULL | | | | qty | int(11) | YES | | NULL | | | | totalPrice | float(10,2) | YES | | NULL | | | | dateAdded | timestamp(6) | YES | | NULL | | ++------------+--------------+------+-----+---------+-------+ I currently use this statement to display a user's cart contents: SELECT items.itemId, description, link, qty, price FROM carts, items WHERE carts.custId = '$custId' AND items.itemId = carts.itemId If a user happens to add the same item to their cart more than once, this statement displays the item more then once. Is there a way I can augment the select statement above so I can group multiple instances of the same product into a single line, but still get a sum of the quantities so the single lines reflects the total quantity of all the instances. So for example, if add 2 of itemId 1 and then add 3 more of itemId 1 my cart will display itemId 1 two times ... once with a qty of 2 and once with a qty of 3. Instead, I would like it to display one time with a qty of 5. Make sense? I'm sure I could hack around this, but I'd like to know if it is doable in a single select statement. Thanks! Nick --