Query returns too few rows
- by Tareq
setup:
mysql> create table product_stock(
product_id integer, qty integer, branch_id integer);
Query OK, 0 rows affected (0.17 sec)
mysql> create table product(
product_id integer, product_name varchar(255));
Query OK, 0 rows affected (0.11 sec)
mysql> insert into product(product_id, product_name)
values(1, 'Apsana White DX Pencil');
Query OK, 1 row affected (0.05 sec)
mysql> insert into product(product_id, product_name)
values(2, 'Diamond Glass Marking Pencil');
Query OK, 1 row affected (0.03 sec)
mysql> insert into product(product_id, product_name)
values(3, 'Apsana Black Pencil');
Query OK, 1 row affected (0.03 sec)
mysql> insert into product_stock(product_id, qty, branch_id)
values(1, 100, 1);
Query OK, 1 row affected (0.03 sec)
mysql> insert into product_stock(product_id, qty, branch_id)
values(1, 50, 2);
Query OK, 1 row affected (0.03 sec)
mysql> insert into product_stock(product_id, qty, branch_id)
values(2, 80, 1);
Query OK, 1 row affected (0.03 sec)
my query:
mysql> SELECT IFNULL(SUM(s.qty),0) AS stock,
product_name
FROM product_stock s
RIGHT JOIN product p ON s.product_id=p.product_id
WHERE branch_id=1
GROUP BY product_name
ORDER BY product_name;
returns:
+-------+-------------------------------+
| stock | product_name |
+-------+-------------------------------+
| 100 | Apsana White DX Pencil |
| 80 | Diamond Glass Marking Pencil |
+-------+-------------------------------+
1 row in set (0.00 sec)
But I want to have the following result:
+-------+------------------------------+
| stock | product_name |
+-------+------------------------------+
| 0 | Apsana Black Pencil |
| 100 | Apsana White DX Pencil |
| 80 | Diamond Glass Marking Pencil |
+-------+------------------------------+
To get this result what mysql query should I run?
