Question

我正在使用此查询获取单个总值：

SELECT SUM(`contact_awards`.`amount`) AS amount
FROM (`contact_awards`)
WHERE
    `contact_awards`.`gift_award_id` IN (1) 
AND `created` BETWEEN '2013-05-05' AND '2014-04-01'
GROUP
    BY `contact_awards`.`amount`

但是，在运行时，它会生成包含amount字段的两行：

500
1000

为什么它与sum 1500一起运行单行？

感谢您的帮助

Answer 1

删除GROUP BY子句

SELECT SUM(contact_awards.amount) AS amount
FROM   contact_awards
WHERE  contact_awards.gift_award_id IN (1) 
       AND created BETWEEN '2013-05-05' AND '2014-04-01'

您获得两条记录的原因是因为contact_awards.amount有两个不同的值被分组。

Answer 2

当您使用group by时，结果将由您的分组子句分隔。如果您想要总结一行，只需删除查询末尾的group by即可。

sql sum和group by给出多行

2 个答案: