EMPLOYEES表包含以下字段: FIRST-NAME VARCHAR2(25) COMMISSION NUMBER(3) 执行 SELECT FIRST-NAME, COMMISSION FROM EMPLOYEESS WHERE COMMISSION =(SELECT COMMISSION FROM EMPLOYEES WHERE UPPER(FIRST-NAME)=‘SCOTT’) 什么条件下语句会出错?
A.
Scott has a null commission resolution
B.
Scott has a zero commission resolution
C.
There is not a employees with the first name Scott
D.
The first name values in the date base are in the lower case