关键字“AS”附近的语法不正确。在 SQL Server [重复]

Question

我的 SQL Server 查询有问题：

UPDATE latihan AS t1 ,
       (SELECT Equipment, system_status, functloc 
        FROM latihan 
        WHERE system_status='ESTO') AS t2 
SET t1.functloc = t2.functloc
WHERE t1.supereq = t2.equipment

我只想在基于functloc 的设备上更新functloc supereq。

错误是：

[Err] 42000 - [SQL Server]关键字“AS”附近的语法不正确。
42000 - [SQL Server]关键字“AS”附近的语法不正确。

Answer 1

我想你想要这样的东西：

update t1 set
  functloc = t2.functloc
from latihan t1
inner join (
  select Equipment, system_status, functloc
  from latihan
  where system_status='ESTO'
) t2 on t2.equipment = t1.supereq