NO_DATA_FOUND or TOO_MANY_ROW

In PL/SQL if we write select statement with INTO clause it may return two exceptions NO_DATA_FOUND or TOO_MANY_ROW .
To avoid these execeptions. How do you write SQL statement in alternative way?

Questions by jkverma29

Showing Answers 1 - 3 of 3 Answers

Tiger81

  • Sep 23rd, 2008
 

can take count of the actual query and based upon the count you can proceed like

SELECT empname INTO v_empname FROM Employee WHERE job = 'MANAGER';
Instead of this you can first check the count

SELECT COUNT(1) INTO v_cntmanager FROM Employee WHERE job = 'MANAGER';
IF v_cntmanager = 0 then
......
Else if v_cntmanager > 1 then
........
Else
SELECT empname INTO v_empname FROM Employee WHERE job = 'MANAGER';
End if;

OracleBrain

  • Aug 5th, 2012
 

using Exception block to catch error

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Ashok Kumar Lenka

  • Dec 6th, 2012
 

By Using the Exception Block ,
when_no_data_found then
//Put your code here
when_too_many_rows then
//Put your code here
when others then
//Put your code here
end;

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Ananda Kumar Behera

  • Nov 12th, 2013
 

To avoid use:

Code
  1. DECLARE a variable

  2. SELECT COUNT(*) INTO num WHERE <Condition OF your data retreival FOR SELECT INTO statement>;

  3. IF num==1 THEN

  4. EXECUTE your SELECT INTO statement

  5. END IF

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