How to return row of sum()s - mysql

Question

I now find my original table structure was not good, so want to change it.
But I am having a hard time designing queries to obtain totals in rows with the new structure.
current structure:
+----------+-------+-------+-------+-------+
| state | shop | item0 | item1 | item2 |
+----------+-------+-------+-------+-------+
| 5 | 0 | 1 | 2 | 3 |
| 5 | 1 | 1 | 2 | 3 |
| 5 | 2 | 1 | 2 | 3 |
| 4 | 3 | 1 | 2 | 3 |
+----------+-------+-------+-------+-------+
(quantities of items at shop)
I want to change to these 2 tables:
shops table
+---------+--------+
| shop_id | state |
+---------+--------+
| 0 | 5 |
| 1 | 5 |
| 2 | 5 |
| 3 | 4 |
+---------+--------+
items table
+------------+--------------+
| shop | item | quantity |
+------------+--------------+
| 0 | 0 | 1 |
| 0 | 1 | 2 |
| 0 | 2 | 3 |
| 1 | 0 | 1 |
| 1 | 1 | 2 |
| 1 | 2 | 3 |
| 2 | 0 | 1 |
| 2 | 1 | 2 |
| 2 | 2 | 3 |
| 3 | 0 | 1 |
| 3 | 1 | 2 |
| 3 | 2 | 3 |
+------------+--------------+
The old layout allowed simple queries for getting totals by row:
SELECT state,SUM(item0) t0,SUM(item1) t1,SUM(item2) t2
FROM shops
WHERE state=5
+--------+---------+---------+----------+
| state | t0 | t1 | t2 |
+--------+---------+---------+----------+
| 5 | 3 | 6 | 9 |
+--------+---------+---------+----------+
With the new structure,
I can get the totals in column as follows:
SELECT item,SUM(quantity) total
FROM shops
LEFT JOIN items ON shop=shopid
WHERE state=5
GROUP by item
+--------+---------+
| item | total |
+--------+---------+
| 0 | 3 |
+--------+---------+
| 1 | 6 |
+--------+---------+
| 2 | 9 |
+--------+---------+
but how do I get the totals in rows:
+--------+---------+---------+----------+
| state | t0 | t1 | t2 |
+--------+---------+---------+----------+
| 4 | 1 | 2 | 3 |
| 5 | 3 | 6 | 9 |
+--------+---------+---------+----------+

Answer 1

You might try using a few more JOINs:
SELECT S.state,
SUM(T0.quantity) AS "T0",
SUM(T1.quantity) AS "T1",
SUM(T2.quantity) AS "T2"
FROM shops AS S
LEFT JOIN items AS T0 ON S.shop_id = T0.shop_id AND T0.item=0
LEFT JOIN items AS T1 ON S.shop_id = T1.shop_id AND T1.item=1
LEFT JOIN items AS T2 ON S.shop_id = T2.shop_id AND T2.item=2
GROUP BY S.state
There might be an easier way.