来自未找到自连接中预期错误的关键字

Question

我有一个数据tableEmployees，我想显示公司工资最低的员工的员工姓名，员工编号，经理编号和经理姓名。我决定执行自连接，这是我的代码：

select worker.employee_id, worker.last_name "Worker Last Name",
worker.salary manager.last_name "Manager Last Name", manager.manager_id
from employees worker join employees manager
on worker.manager_id = manager.employee_id
having worker.salary = (select min(salary)
                        from employees);

然而，当我运行这个时，错误"from keyword not found where expected"弹出。我该怎么办？

Answer 1

哎呀，意识到自己的错误了。我忘了在 worker.salary 和 manager.last_name 之间放一个逗号，我不应该用 WHERE 而不是 HAVING。

select worker.employee_id, worker.last_name "Worker Last Name",
worker.salary, manager.last_name "Manager Last Name", manager.manager_id
from employees worker join employees manager
on worker.manager_id = manager.employee_id
where worker.salary = (select min(salary)
                       from employees);

修正这两个错误后，代码运行正常。

来自未找到自连接中预期错误的关键字

From Keyword Not Found Where Expected Error in Self Join

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