MySQL的：每月時間戳本月，上月和

Question

我有以下MySQL表

amount timestamp 
3  1367638029 
4  1367638029 
5  1366445119 
8  1366445200 

我如何返回基於這個月的總和（金額）（不過去30天），上月類似下面

  total amount 
This month 7 
Last month 13 

Answer 1

這canbe做這樣：

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