Deal with exceptions

Question

I have DB tigger which has 2 select statements and sometimes in both statements
exception no_data_found raise
what i want is : when exception no_data_found is raised for the first statement do action
and do another action for the second statement, how can i do that?
And below another question ...
I have an if condition as follow in DB trigger :
BEGIN
SELECT 'X' INTO V FROM DUAL
WHERE CONDITION;
IF V IS NOT NULL THEN
DO SOMETHING1;
ELSE
DO SOMETHING2;
ENDIF ;
EXCEPTION
WHEN NO_DATA_FOUND THEN
DO SOMETHING3;
END;
About the above script when NO DATA RETRIVED I want to do DO SOMETHING2 in ELSE statement not SOMETHING3
which located in the exception section.
hope you understand my requirement
thanks :)
Edited by: user12166119 on 27/03/2013 06:37 ص

Answer 1

user12166119 wrote:
I have DB tigger which has 2 select statements and sometimes in both statements
exception no_data_found raise
what i want is : when exception no_data_found is raised for the first statement do action
and do another action for the second statement, how can i do that?You can include PL/SQL blocks within your trigger to handle this like so:
BEGIN
     BEGIN
          /*SELECT STATEMENT 1*/
     EXCEPTION
          WHEN no_data_found THEN
               /* Do something here */
     END;
     BEGIN
          /*SELECT STATEMENT 2*/
     EXCEPTION
          WHEN no_data_found THEN
               /* Do something here */
     END;     
END;
/