问题:
The EMP table contains these columns:
LAST NAME VARCHAR2(25)
SALARY NUMBER(6,2)
DEPARTMENT_ID NUMBER(6)
You need to display the employees who have not been assigned to any department. You write the SELECT statement:
SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP
WHERE DEPARMENT_ID = NULL;
What is true about this SQL statement? ()
A . The SQL statement displays the desired results.
B . The column in the WHERE clause should be changed to display the desired results.
C . The operator in the WHERE clause should be changed to display the desired results.
D . The WHERE clause should be changed to use an outer join to display the desired results.
The EMP table contains these columns:
LAST NAME VARCHAR2(25)
SALARY NUMBER(6,2)
DEPARTMENT_ID NUMBER(6)
You need to display the employees who have not been assigned to any department. You write the SELECT statement:
SELECT LAST_NAME, SALARY, DEPARTMENT_ID FROM EMP
WHERE DEPARMENT_ID = NULL;
What is true about this SQL statement? ()
● 参考解析
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