＃1241 - 操作数应包含1列

Question

在这里，我收到这样的错误，

1241 - 操作数应包含1列

我的SQL查询就像，

:new

实际上是什么意思？

Answer 1

问题应该是GROUP BY子句的语法。只需删除括号，就可以了。

SELECT * 
FROM `fx_users_attendance` 
    LEFT OUTER JOIN `fx_account_details` ON fx_account_details.user_id = fx_users_attendance.user_id 
    LEFT OUTER JOIN `fx_departments` ON fx_departments.deptid = fx_account_details.department 
    LEFT OUTER JOIN `fx_users` ON fx_users.id = fx_users_attendance.user_id 
WHERE fx_departments.deptid IN(1)
AND fx_users.id IN(5)
AND YEAR(clock_in) = YEAR(CURDATE())
GROUP BY 01,02,03,04,05,06,07,08,09,10,11,12