Question

我正在尝试选择与另一列中的最小数字相对应的值，然后将其用于另一个表中的SET。

但它告诉我“这里不允许组功能”

有没有其他方法可以实现这一目标？

UPDATE team 
SET OWNERID = (SELECT USERID
         FROM teamuser
         WHERE MIN(CREATETIME) 
         AND teamId = 5) 
WHERE teamId = 5

（团队和teamuser表都有一个列teamId）。

Answer 1

你应该做

UPDATE team 
SET OWNERID = (SELECT USERID
         FROM TEAMUSER 
         WHERE CREATETIME = (select min(CREATETIME) from TEAMUSER)
         AND teamId = 5
)
WHERE teamId = 5

您不能在where子句中使用聚合函数，只能在选择时使用它，或者在分组后的Having子句中使用

Answer 2

UPDATE team 
SET OWNERID = (SELECT USERID
         FROM TEAMUSER 
         WHERE CREATETIME = (SELECT MIN(CREATETIME) FROM TEAMUSER WHERE teamId = 5)
         AND teamId = 5) 
WHERE teamId = 5

SQL MIN（）作为子查询 - “不允许组函数”

2 个答案: