Oracle PL/SQL/Stored Procedure Function/exec

Exec: execute a procedure

SQL>
SQL> set serverout on;
SQL>
SQL> -- Displaying "Hello World!" to the screen.
SQL>
SQL>      CREATE OR REPLACE PROCEDURE HELLO AS
  2       BEGIN
  3            DBMS_OUTPUT.PUT_LINE("Hello World! " ||
  4                 TO_CHAR(SYSDATE,"MM-DD-YY HH:MI:SS AM"));
  5       END;
  6  /
SQL>
SQL> exec HELLO();
Hello World! 09-09-06 07:23:06 PM
SQL>

Procedure without parameters

 
SQL>
SQL> CREATE or replace PROCEDURE my_first_proc IS
  2          greetings VARCHAR2(20);
  3  BEGIN
  4          greetings := "Hello World";
  5          dbms_output.put_line(greetings);
  6  END my_first_proc;
  7  /
Procedure created.
SQL>
SQL>
SQL> set serveroutput on
SQL> EXECUTE my_first_proc;
Hello World
PL/SQL procedure successfully completed.
SQL>
SQL> BEGIN
  2          my_first_proc;
  3  END;
  4  /
Hello World
PL/SQL procedure successfully completed.
SQL>
SQL>

Use EXEC to execute a Stored Procedure

 
SQL>
SQL>
SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
  2                    ENAME VARCHAR2(10),
  3                    JOB VARCHAR2(9),
  4                    MGR NUMBER(4),
  5                    HIREDATE DATE,
  6                    SAL NUMBER(7, 2),
  7                    COMM NUMBER(7, 2),
  8                    DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK",    7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD",  "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER",  7839, TO_DATE("2-APR-1981",  "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL> select * from emp;
     EMPNO ENAME      JOB              MGR
---------- ---------- --------- ----------
HIREDATE                    SAL       COMM
-------------------- ---------- ----------
    DEPTNO
----------
      7369 SMITH      CLERK           7902
17-DEC-1980 00:00:00        800
        20
      7499 ALLEN      SALESMAN        7698
20-FEB-1981 00:00:00       1600        300
        30
      7521 WARD       SALESMAN        7698
22-FEB-1981 00:00:00       1250        500
        30
      7566 JONES      MANAGER         7839
02-APR-1981 00:00:00       2975
        20
      7654 MARTIN     SALESMAN        7698
28-SEP-1981 00:00:00       1250       1400
        30
      7698 BLAKE      MANAGER         7839
01-MAY-1981 00:00:00       2850
        30
      7782 CLARK      MANAGER         7839
09-JUN-1981 00:00:00       2450
        10
      7788 SCOTT      ANALYST         7566
09-DEC-1982 00:00:00       3000
        20
      7839 KING       PRESIDENT
17-NOV-1981 00:00:00       5000
        10

     EMPNO ENAME      JOB              MGR
---------- ---------- --------- ----------
HIREDATE                    SAL       COMM
-------------------- ---------- ----------
    DEPTNO
----------
      7844 TURNER     SALESMAN        7698
08-SEP-1981 00:00:00       1500          0
        30
      7876 ADAMS      CLERK           7788
12-JAN-1983 00:00:00       1100
        20
      7900 JAMES      CLERK           7698
03-DEC-1981 00:00:00        950
        30
      7902 FORD       ANALYST         7566
03-DEC-1981 00:00:00       3000
        20
      7934 MILLER     CLERK           7782
23-JAN-1982 00:00:00       1300
        10

14 rows selected.
SQL>
SQL> CREATE OR REPLACE PROCEDURE emp_change_s (i_emp_id IN integer)
  2  AS BEGIN
  3  UPDATE emp
  4  set ename = "S"
  5  WHERE empno =  i_emp_id;
  6  END emp_change_s;
  7  /
Procedure created.
SQL> show error
No errors.
SQL>
SQL> exec emp_change_s(7369);
PL/SQL procedure successfully completed.
SQL>
SQL>
SQL> drop table emp;
Table dropped.
SQL>
SQL> --