Question

我有这张表p_payments。该表格包含payment_amount，payment_status和createdtime列：

p_payments
____________________________
payment_status      varchar(25)
payment_amount      decimal(7,2)
createdtime         datetime

如何创建一个能够计算过去30天收入总和WHERE payment_status = completed的查询？

我的表

payments_status     payment_amount     createdtime
----------------------------------------------------------
Completed               1.00           2013-09-29 21:45:02
Denied                  2.00
Failed                  1.50
... etc

Answer 1

SELECT Sum(payment_amount) 
FROM   p_payments 
WHERE  payments_status = 'completed' 
       AND createdtime >= Date_Sub(Curdate(), INTERVAL 30 day)

Answer 2

SELECT SUM( p.`payment_amount` ) AS `total_payments`
FROM `payments` p
WHERE DATEDIFF(NOW(), p.createdtime) <= 30
  AND p.payment_status = 'Completed'

查询计算行的总和（最近30天）

2 个答案: