在单个查询中按总和和总和获取组

Question

有没有办法在一个查询中按类别和所有产品的总价格获得所有产品的总价。

以下是我使用按类别给出价格的查询。

SELECT SUM(price) as totalprice
FROM products 
Group BY category_id

Answer 1

将ROLLUP与您的查询一起使用。

GROUP BY子句允许WITH ROLLUP修饰符，该修饰符ROLLUP额外的行添加到摘要输出中。

SELECT category_id,SUM(price) as totalprice
FROM products 
GROUP BY category_id WITH ROLLUP

Answer 2

SELECT category_id, SUM(price) as totalprice
FROM products 
GROUP BY category_id WITH ROLLUP

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