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
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