. Which of thefollowing would NOT produce an SQL error?
a. SELECT DEPT.DEPT_ID,COUNT(EMP_ID) FROM DEPT, EMPLOYEE WHERE DEPT.ID = EMPLOYEE.ID ;
b. SELECT * FROMCUSTOMER, SALES ;
c. SELECT DEPT.DEPT_ID,COUNT(EMP_ID) FROM DEPT D, EMPLOYEE E WHERE D.DEPT_ID = E.DEPT_IDGROUP BY D.DEPT_ID ;
d. SELECT CUST_ID FROMCUSTOMER, ORDER WHERE CUSTOMER.CUST_ID = ORDER.CUST_ID ;
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