CHAPTER 5 EXCEPTION HANDLING - ppt download

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PL/SQL BLOCK STRUCTURE PL/SQL block has the following structure: DECLARE Declaration statements BEGIN Executable statements EXCEPTION Exception-handling statements END ;
In other words, you need to specify in your program under which circumstances an exception must be raised as shown : DECLARE. exception_name EXCEPTION; BEGIN. … IF CONDITION THEN. RAISE exception_name; ELSE. END IF; EXCEPTION. WHEN exception_name. THEN. ERROR-PROCESSING. STATEMENTS; END;