You need to drop a table from within a stored procedure. How would you do this?

Examine the following code: CREATE OR REPLACE PROCEDURE add_dept ( p_name dept.dname%TYPE DEFAULT 'unknown', p_loc dept.locE%TYPE DEFAULT 1700) IS BEGIN INSERT INTO dept VALUES (dept_seq.NEXTVAL,p_name, p_loc); END add_dept; / You created the add_dept procedure above. Now you want to invoke the procedure in SQL *Plus. Which of the following are the valid invocations?

Which lock is used in Pl/Sql if the where clause evaluates to a set of data?

Which part of a database trigger determines the number of times a trigger body executes?

Examine the code given below: CREATE OR REPLACE TRIGGER secure_emp BEFORE LOGON ON employees BEGIN IF (TO_CHAR(SYSDATE, 'DY') IN (SAT', 'SUN')) OR (TO_CHAR(SYSDATE, 'HH24:MI') NOT BETWEEN '08:00' AND '18:00') THEN RAISE_APPLICATION_ERROR (-20500, 'You may insert into the EMPLOYEES table only during business hours.'); END IF; END; / What type of trigger is this?

You need to create a trigger on the EMP table, which monitors every row that is changed and places this information in the AUDIT_TABLE. What type of trigger would you create?

Which command is used to disable all the triggers on an EMP table?

Which statements are correct with regard to packages?

CREATE OR REPLACE PACKAGE manage_emp IS tax_rate CONSTANT NUMBER(5,2) := .28; v_id NUMBER; PROCEDURE insert_emp (p_deptno NUMBER, p_sal NUMBER); PROCEDURE delete_emp; PROCEDURE update_emp; FUNCTION cal_tax (p_sal NUMBER) RETURN NUMBER; END manage_emp; / CREATE OR REPLACE PACKAGE BODY manage_emp IS PROCEDURE update_sal (p_raise_amt NUMBER) IS BEGIN UPDATE emp SET sal = (sal * p_raise_emt) + sal WHERE empno = v_id; END; PROCEDURE insert_emp (p_deptno NUMBER, p_sal NUMBER) IS BEGIN INSERT INTO emp(empno, deptno, sal) VALUES (v_id, p_depntno, p_sal); END insert_emp; PROCEDURE delete_emp IS BEGIN DELETE FROM emp WHERE empno = v_id; END delete_emp; PROCEDURE update_emp IS v_sal NUMBER(10,2); v_raise NUMBER(10, 2); BEGIN SELECT sal INTO v_sal FROM emp WHERE empno = v_id; IF v_sal < 500 THEN v_raise := .05; ELSIP v_sal < 1000 THEN v_raise := .07; ELSE v_raise := .04; END IF; update_sal(v_raise); END update_emp; FUNCTION cal_tax (p_sal NUMBER)RETURN NUMBER IS BEGIN RETURN p_sal * tax_rate; END cal_tax; END manage_emp; / What is the name of the private procedure in this package?

Examine the code given below: CREATE OR REPLACE TRIGGER update_emp AFTER UPDATE ON emp BEGIN INSERT INTO audit_table (who, dated) VALUES (USER, SYSDATE); END; / You issue an UPDATE command in the EMP table, which results in changing 10 rows. How many rows are inserted in the AUDIT_TABLE ?

Which statement is correct?