mysql：本月，上个月和每个月的时间戳

Question

我有以下mysql表

amount  timestamp
3       1367638029
4       1367638029
5       1366445119
8       1366445200

如何根据本月（不是过去30天）以及上个月（如下所示）返回金额（金额）

            total amount
This month  7
Last month  13

Answer 1

这可以这样做：

SELECT SUM(AMOUNT)
FROM yourtable
WHERE MONTH(FROM_UNIXTIME(timestamp)) IN/BETWEEN ... -- consider YEAR(...)as well
GROUP BY MONTH(FROM_UNIXTIME(timestamp))