我有这张桌子:
CREATE TABLE IF NOT EXISTS `voertuiglijnen`
(
`id` int(11) NOT NULL AUTO_INCREMENT,
`voertuig` int(11) NOT NULL,
`lijn` text NOT NULL,
`publijn` int(11) NOT NULL,
`rit` int(11) NOT NULL,
PRIMARY KEY (`id`)
);
这是一些示例输入:
|id |voertuig |lijn |publijn |rit
|------|------------|--------|-----------|-----
|1 |5376 |A060 |60 |1
|2 |5376 |A062 |62 |2
|3 |5376 |A062 |62 |3
我希望SQL结果以相同的“ voertuig”显示每个“ lijn”,然后通过出现“ lijn”对其进行排序。
SELECT DISTINCT `lijn`, `publijn`, count(*) as aantal
FROM `voertuiglijnen`
WHERE `voertuig` = '5376'
ORDER BY aantal DESC
在这种情况下,应将A062放在第一位,并将A060放在第二位。但这是相反的。
我在这里做错了什么?
最佳答案
使用GROUP BY代替DISTINCT:
SELECT `lijn`, `publijn`, count(*) as aantal
FROM `voertuiglijnen`
WHERE `voertuig` = '5376'
GROUP BY 1,2
ORDER BY aantal DESC
关于mysql - MySQL Count多列语法,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/24597962/