πŸ“Š Database Management System (DBMS)
Q. View the Exhibit and examine the data in the EMPLOYEES tables. Evaluate the following SQL statement: SELECT employee_id, department_id FROM employees WHERE department_id= 50 ORDER BY department_id UNION SELECT employee_id, department_id FROM employees WHERE department_id= 90 UNION SELECT employee_id, department_id FROM employees WHERE department_id= 10; What would be the outcome of the above SQL statement?
  • (A) The statement would execute successfully and display all the rows in the ascending order ofDEPARTMENT_ID.
  • (B) The statement would execute successfully but it will ignore the ORDER BY clause and display the rows in random order.
  • (C) The statement would not execute because the positional notation instead of the column name should be used with the ORDER BY clause.
  • (D) CREATE TABLE ord_details (ord_no NUMBER(2), item_no NUMBER(3), ord_date date DEFAULT SYSDATE NOT NULL, CONSTRAINT ord_pk PRIMARY KEY (ord_no, item_no));
πŸ’¬ Discuss
βœ… Correct Answer: (D) CREATE TABLE ord_details (ord_no NUMBER(2), item_no NUMBER(3), ord_date date DEFAULT SYSDATE NOT NULL, CONSTRAINT ord_pk PRIMARY KEY (ord_no, item_no));

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