mysql查询子查询循环？

Question

我有一个查询

SELECT 
    count(product) as amount, 
    product, 
    sum(price) AS price 
FROM `products` 
WHERE 
    brid = 'broker' 
AND 
    cancelled is null 
GROUP BY product 
WITH ROLLUP 

是否可以查询表得到一个经纪人ID，然后为每个代理运行查询，上面写的是1个查询？

几乎像：

SELECT brid FROM membership 
THEN 

SELECT 
    count(product) as amount, 
    product, 
    sum(price) AS price 
FROM `products` 
WHERE 
    brid = membership.brid 
AND 
    cancelled is null 
GROUP BY product 
WITH ROLLUP 

THEN 
SELECT NEXT brid 

这可能吗？我知道如何在PHP中做到这一点，但我更喜欢1查询可以创建一个数组而不是每个查询吨。

谢谢 亚当。

Answer 1

SELECT 
    count(product) as amount, 
    product, 
    sum(price) AS price 
FROM `products` 
INNER JOIN membership on membership.brid = products.brid 
WHERE 
    cancelled is null 
GROUP BY product 
WITH ROLLUP 

Answer 2

当然，您可以GROUP BY“brid”字段和“product”字段。如下文所述，WITH ROLLUP将导致其由“布里德”进行排序，然后通过“产品”：

SELECT 
    brid, 
    count(product) as amount, 
    product, 
    sum(price) AS price 
FROM `products` 
WHERE 
    brid IN (SELECT brid FROM membership) 
AND 
    cancelled is null 
GROUP BY brid, product 
WITH ROLLUP 

Answer 3

据我可以从你的例子明白，你需要的是inner join between membership and products on brid

拿下面的例子：

products表：

CREATE TABLE `test` (
    `price` int(11) DEFAULT NULL, 
    `product` varchar(20) DEFAULT NULL, 
    `brid` varchar(20) DEFAULT NULL, 
    `cancelled` varchar(20) DEFAULT NULL 
) 

membership表：

CREATE TABLE `membership` (
    `brid` varchar(20) DEFAULT NULL 
) 

而下面是我query，你需要：

SELECT 
    t.brid, count(t.product) as amount, 
    t.product, 
    sum(t.price) AS price 
FROM products t, membership m 
WHERE 
    t.brid = m.`brid` 
AND 
    cancelled is null 
GROUP BY product 

希望帮助！