Exception if UPDATE.....WHERE..... statement fails

Question

Hi All
I am new to Oracle. I am using PL/SQL with embedded SQL queries.
I wanted to know, if i am writing an UPDATE ..... WHERE...stmt inside my PL/SQL block....and the statement fails as per the criteria i have given, is there any exception raised???
Like we have the NO_DATA_FOUND in the case of a failing SELECT query??
Do i need to catch if at all the exception takes place?
Kindly Guide.....
Best Regards

Answer 1

Hello,
Its true that if an UPDATE stmt does not update any rows, it does not raise an exception.
But you can keep trackof it ... using SQL%ROWCOUNT.
For eg:
begin
update emp e set e.sal=1500 where e.empno=7234;
if sql%rowcount = 0 then
   dbms_output.put_line('No Rows updated !');
   -- you can add more code here if you want ...
else
   dbms_output.put_line(sql%rowcount||' Rows updated !');  
end if;
end;It means that if the select find a row with empno=7234, it'ld update a row, otherwise it'll not.
Hope this helps.
Regards,
Madhu !