ORA-00923 - 未找到預期的FROM關鍵字

Question

我收到了此錯誤消息「FROM keyword not found where expected」。我究竟做錯了什麼？

SELECT department_id 
FROM employees 
HAVING MIN(salary) < (SELECT MIN(salary) 
     WHERE department_id < 60) 
GROUP BY department_id; 

感謝您的幫助！

Answer 1

您是從行缺少一個：

SELECT MIN(salary) 
     WHERE department_id < 60 

它需要

SELECT MIN(salary) FROM {TABLENAMEHERE} 
     WHERE department_id < 60 

對於完整的查詢：

SELECT department_id 
FROM employees 
GROUP BY department_id 
HAVING MIN(salary) < (SELECT MIN(salary) FROM {TABLENAMEHERE} 
     WHERE department_id < 60);