An example showing continuing program execution after handling exception : Handle Exception « PL SQL Programming « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. PL SQL Programming
3. Handle Exception

SQL> create table product(
  2     product_id number(4)     not null,
  3     product_description varchar2(20) not null
  4  );

Table created.

SQL>
SQL> insert into product values (1,'Java');

1 row created.

SQL> insert into product values (2,'Oracle');

1 row created.

SQL> insert into product values (3,'C#');

1 row created.

SQL> insert into product values (4,'Javascript');

1 row created.

SQL> insert into product values (5,'Python');

1 row created.

SQL>
SQL>
SQL> DECLARE
  2    v_descr VARCHAR2(20);
  3  BEGIN
  4    BEGIN
  5      SELECT product_description
  6      INTO v_descr
  7      FROM product
  8      WHERE product_id =10;
  9      dbms_output.put_line(v_descr);
 10    EXCEPTION WHEN NO_DATA_FOUND THEN
 11      INSERT INTO product VALUES (10,'Assistant');
 12      COMMIT;
 13    END;
 14    BEGIN
 15      SELECT product_description
 16      INTO v_descr
 17      FROM product
 18      WHERE product_id =1;
 19      dbms_output.put_line(v_descr);
 20    EXCEPTION WHEN NO_DATA_FOUND THEN
 21      dbms_output.put_line('ERR:Invalid Data for Hierarchy');
 22    END;
 23  EXCEPTION
 24    WHEN OTHERS THEN
 25      dbms_output.put_line('ERR:An error occurred with info :'||
 26      TO_CHAR(SQLCODE)||' '||SQLERRM);
 27  END;
 28  /
Java

PL/SQL procedure successfully completed.

SQL>
SQL>
SQL> drop table product;

Table dropped.

SQL>