我的查询:计数数据
"SELECT id
FROM user_follow
WHERE user_id IN(3,6) AND follow_id NOT IN(3,6)
GROUP BY follow_id";
,它显示:
[users] => Array
(
[0] => Array
(
[id] => 20
)
[1] => Array
(
[id] => 9
)
[2] => Array
(
[id] => 19
)
)
我需要统计数据(在这个例子中查询必须归还3的结果)
我试过COUNT(ID)但结果对我不好。
结果:
[0] => Array
(
[count(id)] => 1
)
我试图SELECT COUNT(1)
结果:
[0] => Array
(
[count(1)] => 1
)
[1] => Array
(
[count(1)] => 2
)
[2] => Array
(
[count(1)] => 1
)
还没不是一数(3)。我想是这样的[用户] => 3
你是什么意思的“效果不好”?你有错误吗?不是正确的号码吗? – jprofitt 2012-01-29 00:14:50
删除'GROUP BY'然后....并只是'SELECT COUNT(DISTINCT id)' – Wrikken 2012-01-29 00:15:56
我不能删除GROUP BY follow_id,因为http://stackoverflow.com/questions/9049401/select-all-my -and-my-friends-friends-except-us-both-sql此组防止显示重复的朋友 – Viktors 2012-01-29 00:35:14