Oracle PL/SQL - ORA-01403 “No data found” when using “SELECT INTO”

Question

I have a pl sql code that execute three queries sequentially to determine a match level and do some logic
The issue is - when first query has no results (completely valid scenario) I get ORA-01403 No data found.
I understand that I need to incorporate [ Exception clause when NO_DATA_FOUND ]- but how to add it and continue to the next query?

PL/SQL Code
     SELECT A into PARAM A FROM SAMPLE WHERE SOME CONDITION;
     --  GOT ORA-01403  No data found HERE 

     MATCH_LEVEL =1;
     if A is null then 
          do some logic;
     end if


     SELECT A INTO PARAM_B FROM SAMPLE WHERE SOME OTHER CONDITION
     MATCH_LEVEL =2
     if A is null then 
          do some logic 2;
     end if



     SELECT A INTO PARAM_B FROM SAMPLE WHERE SOME OTHER CONDITION
     MATCH_LEVEL =3
     if A is null then 
          do some logic 3;
     end if

END    PL/SQL Code

Answer 1

Declare
--your declarations 
begin
SELECT A into PARAM A FROM SAMPLE WHERE SOME CONDITION;
 --  GOT ORA-01403  No data found HERE 

 Begin

   MATCH_LEVEL =1;
   if A is null then 
        do some logic;
   end if;
 EXCEPTION 
 WHEN NO_DATA_FOUND THEN 
  dbms_output.put_line ('Error...'); 
 END; 
 --- and son on for other blocks

end;

Answer 2

Just surround your SELECT INTO with begin-end;

begin 

    -- your faulty statement here
Exception
When NO_DATA_FOUND Then
    -- Do what you want or nothing 
WHEN TOO_MANY_ROWS THEN
    -- what if you get more then one row? and need specific handler for this 
When OTHERS Then
    -- do something here or nothing (optional - may happen if you have more than your SELECT INTO between 'begin' and 'Exception')

end;

This is like try block of PL/Sql

With this technique you can log the reason your statement failed.