每月选择

Question

我有下表:

purchases(id, item, user, price, time);

该time领域是一个timestamp.

我需要一个每月返回一行的查询,该行将包含该price月中每个项目的总和.

Answer 1

试试这个:

SELECT MONTH(`time`) AS month, SUM(price) AS price
FROM your_table
GROUP BY MONTH(`time`)

如果您有一年以上的数据,您可能还希望通过以下方式将年份包括在您的组中:

SELECT YEAR(`time`) AS year, MONTH(`time`) AS month, SUM(price) AS price
FROM your_table
GROUP BY YEAR(`time`), MONTH(`time`)