我正在尝试从我的 MySQL 表中获取一些统计信息,并希望将其保留为单个查询。只是不知道如何(或者甚至可能)。我有这两个问题:
SELECT COUNT(*) AS `accept`
FROM `status`
WHERE `groupID` IN (98779,98780)
AND `group` = 'order'
AND `status` = 'accept'
和
SELECT COUNT(*) AS `price`
FROM `status`
WHERE `groupID` IN (98779, 98780)
AND `group` = 'quotation'
AND (`status` = 'final' OR `status` = 'manualprice')
我最好的建议是像这样将它们组合在一个 SELECT
中:
SELECT
(SELECT COUNT(*) AS `accept`
FROM `status`
WHERE `groupID` IN (98779, 98780) AND `group` = 'order' AND `status` = 'accept') AS accept,
(SELECT COUNT(*) AS `price`
FROM `status`
WHERE `groupID` IN (98779, 98780) AND `group` = 'quotation' AND (`status` = 'final' OR `status` = 'manualprice')) AS price
有没有更好的办法?
最佳答案
还有另一种方法,
SELECT SUM(`group` = 'order' AND `status` = 'accept') AS `ACCEPT`,
SUM(`group` = 'quotation' AND (`status` = 'final' OR `status` = 'manualprice')) AS `PRICE`
FROM `status`
WHERE `groupID` IN (98779, 98780) AND
`group` IN ('order', 'quotation') AND
`status` IN ('accept', 'final', 'manualprice')
关于mysql - 将对同一张表的查询合并为一个查询,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18272896/