SQL Server error: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or

Question

运行 SQL 服务器中的查询时出现以下错误：

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or

谁能帮帮我

我的代码如下所示：

UPDATE a
SET a.id = (SELECT f.id
            FROM f 
            JOIN a ON a.fun = [f].funny
            WHERE a.fun = [f].funny);

Answer 1

您可以尝试使用加入更新

update t1 set t1.col = t2.col
from table1 t1
join table2 t2 on t2.id = t1.id
where conditions ...

sql