If count() is 0, insert data : IF « PL SQL « Oracle PL / SQL






  1. Oracle PL / SQL
  2. PL SQL
  3. IF

If count() is 0, insert data

    
SQL> CREATE TABLE emp (
  2    id         NUMBER PRIMARY KEY,
  3    fname VARCHAR2(50),
  4    lname  VARCHAR2(50)
  5  );

Table created.

SQL>
SQL> INSERT INTO emp (id, fname, lname)VALUES (1, 'A', 'B');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (2, 'C', 'D');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (3, 'Enn', 'F');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (4, 'G', 'H');

1 row created.

SQL> INSERT INTO emp (id, fname, lname)VALUES (5, 'G', 'Z');

1 row created.

SQL>
SQL>
SQL> DECLARE
  2
  3     v_count PLS_INTEGER := 0;
  4
  5  BEGIN
  6     SELECT COUNT(1) INTO v_count FROM emp WHERE id = 55;
  7
  8     IF v_count = 0
  9     THEN
 10        INSERT INTO emp VALUES (54, 'R', 'W');
 11        DBMS_OUTPUT.PUT_LINE('Added emp');
 12     ELSE
 13        DBMS_OUTPUT.PUT_LINE('emp already exists');
 14     END IF;
 15
 16     COMMIT;
 17
 18  EXCEPTION
 19     WHEN OTHERS
 20     THEN
 21        DBMS_OUTPUT.PUT_LINE(SQLERRM);
 22  END;
 23  /
Added emp

PL/SQL procedure successfully completed.

SQL> drop table emp;

Table dropped.

SQL>








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