Oracle家庭作業-SQL語句錯誤-再次

Question

我不確定為什么會收到此錯誤，此代碼相當簡單。 錯誤是：

ORA-00920：無效的關系運算符

代碼是：

SELECT FIRST_NAME || ' ' || LAST_NAME AS "EMPLOYEES"
FROM F_STAFFS
WHERE LAST_NAME LIKE 'D%'
AND LAST_NAME LIKE '%a%' AND '%e%';

我試圖在標題為“ EMPLOYEES”的列中顯示名字和姓氏，其中姓氏以“ D”開頭，姓氏包含字母“ a”和“ e”。

謝謝！

Answer 1

SELECT FIRST_NAME || ' ' || LAST_NAME AS "EMPLOYEES"
FROM F_STAFFS
WHERE LAST_NAME LIKE 'D%'
AND LAST_NAME LIKE '%a%' AND LAST_NAME LIKE '%e%';

但這可以簡化為：

SELECT FIRST_NAME || ' ' || LAST_NAME AS "EMPLOYEES"
FROM F_STAFFS
WHERE LAST_NAME LIKE 'D%a%' AND LAST_NAME LIKE '%e%';

Answer 2

'%e%'不是有效的邏輯表達式。

您需要的是：

AND LAST_NAME LIKE '%a%' AND LAST_NAME LIKE '%e%';