1
我有2个简单的表格,如下面显示MySQL的用户数没有问题
users
id name surname
1 John Douglas
2 Sam Morris
3 Michael Johnatan
cells
id userId cellPhone
1 1 13809876543
2 1 13809876525
3 2 13809876450
的结果,我想最后只使用Mysql:
result
name surname cellPhone
John Douglas 13809876543,13809876525
Sam Morris 13809876450
Michael Johnatan
这里是我的sql查询
SELECT
o.name,
o.surname,
CONCAT(ons.cellPhone, ',', ons2.cellPhone) as CellPhone
FROM
users as o
LEFT JOIN cells as ons
ON o.id = ons.userId
LEFT JOIN cells as ons2
ON o.id = ons2.userId AND
ons.id NOT LIKE ons2.id
GROUP BY o.id
因此,在这种情况下,在最后我得到这样的结果:
result
Name Surname Phones
John Douglas 13809876543,13809876525
Sam Morris
Michael Johnatan
你可以看到,sql不显示Sam的电话。据我了解,它显示当用户有2个电话号码。我尝试了很多来修复它。我会赞赏,如果有人可以帮助..
+1我想知道的是,为什么我没有想到了GROUP_CONCAT – Rashad 2014-10-10 11:00:59