asp.net - SQL 计数为 XXX

Question

我正在尝试选择用户关注者。作为

SELECT     
profil_id, 
profil_user_id, 
profil_fullname, 
profil_puan, 
profil_aciklama, 
UserId,
UserName
COUNT(select follower_id  from follow where followed_id='2') as follower

FROM         
profil ,aspnet_Users
WHERE
profil_user_id ='2' and
profil.profil_user_id=aspnet_Users.UserID

我想选择关注者数量，但它不起作用。错误：*关键字“as”附近的语法不正确。* 问题出在哪里？（我不想使用左连接它有问题）

Answer 1

代替

COUNT(select follower_id  from follow where followed_id='2') as follower

和

(select COUNT(follower_id)  from follow where followed_id='2') as follower

Answer 2

你错过了一个,之后UserName

UserName // <-- missed ',' here
COUNT(select follower_id  from follow where followed_id='2') as follower

此外，这不是有效的 sql server 查询

COUNT(select follower_id  from follow where followed_id='2') as follower

一个有效的选择是遵循 Danila 的代码