嗨,我有“sql查询”,以查看上周每个成员完成的工作的数量,所以我创建“sql查询”,这是非常的工作,但我想将周期从1周或周2更改为此数据我的“sql查询”是：

SELECT `staffID`,

SUM(if (created_at BETWEEN NOW()-INTERVAL 1 WEEK AND NOW(), 1,0))

AS `week1`,

SUM(if (created_at BETWEEN NOW()-INTERVAL 2 WEEK AND NOW()-INTERVAL 1 WEEK, 1,0))

AS `week2`,

FROM tasks where status ='done'

GROUP BY `staffID

我想成为这样的“SQL查询”,但mysql给我错误.那么,无论如何要解决这个问题？

SELECT `staffID`,

SUM(if (created_at BETWEEN NOW()-INTERVAL 1 WEEK AND NOW(), 1,0))

AS NOW()-INTERVAL 1 WEEK,

SUM(if (created_at BETWEEN NOW()-INTERVAL 2 WEEK AND NOW()-INTERVAL 1 WEEK, 1,0))

AS NOW()-INTERVAL 2 WEEK,

FROM tasks where status ='done'

GROUP BY `staffID

sql给我这条消息：

1064 – 您的SQL语法有错误;查看与您的MySQL服务器版本对应的手册,以便在’NOW()附近使用正确的语法 – INTERVAL 1 WEEK