I bought a new house last year, but I ______ my old house yet, so at the moment I have two

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_IDFROM EMPWHERE DEPARTMENT_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_IDFROM EMPWHERE DEPARTMENT_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 EMPWHERE 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_IDFROM EMPWHERE 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.

oyees in the EMP table. The EMP table contains these columns:Which statement ensures that a value is displayed in the calculated columns for all employees？（）

A. SELECT last_name, 12*salary* commission_pct FROM emp;

B. SELECT last_name, 12*salary* (commission_pct,0) FROM emp;

C. SELECT last_name, 12*salary*(nvl(commission_pct,0)) FROM emp;

D. SELECT last_name, 12*salary*(decode(commission_pct,0)) FROM emp;

The EMP table contains these columns:EMPLOYEE_ID NUMBER(4)EMPNAME VARCHAR2 (25)SALARY NUMBER(9,2)HIRE_DATE DATEYou query the database with this SQL statement:SELECT empname,hire_date HIREDATE, salaryFROM EMPORDER BY hire_date;How will the results be sorted？（）

A.randomly

B.ascending by date

C.descending by date

D.ascending alphabetically

E.descending alphabetically

oyees in the EMP table. The EMP table contains these columns:LAST NAME VARCNAR2(35) NOT NULLSALARY NUMBER(9,2) NOT NULLCOMMISION_PCT NUMBER(4,2)Which statement ensures that a value is displayed in the calculated columns for all employees？（）

A. SELECT last_name, 12*salary* commission_pct FROM emp;

B. SELECT last_name, 12*salary* (commission_pct,0) FROM emp;

C. SELECT last_name, 12*salary*(nvl(commission_pct,0)) FROM emp;

D. SELECT last_name, 12*salary*(decode(commission_pct,0)) FROM emp;

oyees in the EMP table. The EMP table contains these columns:LAST NAME VARCNAR2(35) NOT NULLSALARY NUMBER(9,2) NOT NULLCOMMISION_PCT NUMBER(4,2)Which statement ensures that a value is displayed in the calculated columns for all employees？ （）

A. SELECT last_name, 12*salary* commission_pct FROM emp;

B. SELECT last_name, 12*salary* (commission_pct,0) FROM emp;

C. SELECT last_name, 12*salary*(nvl(commission_pct,0)) FROM emp;

D. SELECT last_name, 12*salary*(decode(commission_pct,0)) FROM emp;

The EMPLOYEES table contains these columns:LAST_NAME VARCHAR2 (25)SALARY NUMBER (6,2)COMMISSION_PCT NUMBER (6)You need to write a query that will produce these results:1. Display the salary multiplied by the commission_pct.2. Exclude employees with a zero commission_pct.3. Display a zero for employees with a null commission value.Evaluate the SQL statement:SELECT LAST_NAME, SALARY*COMMISSION_PCTFROM EMPLOYEESWHERE COMMISSION_PCT IS NOT NULL;What does the statement provide？（）

A.All of the desired results

B.Two of the desired results

C.One of the desired results

D.An error statement

The EMPLOYEES table contains these columns:LAST_NAME VARCHAR2 (25)SALARY NUMBER (6,2)COMMISSION_PCT NUMBER (6)You need to write a query that will produce these results:1. Display the salary multiplied by the commission_pct.2. Exclude employees with a zero commission_pct.3. Display a zero for employees with a null commission value. Evaluate the SQL statement:SELECT LAST_NAME, SALARY*COMMISSION_PCT FROM EMPLOYEESWHERE COMMISSION_PCT IS NOT NULL;What does the statement provide？ （）

A. All of the desired results

B. Two of the desired results

C. One of the desired results

D. An error statement