How to find if certain record exists from stored procedure

Question

Hello
I am not an expert in this and am trying simple thing. I want to find if certain record exists in a table and if so set some boolean variable.
create or replace procedure findit(param)
AS
return_group boolean;
BEGIN
  myflag := false;
--here goes my question
-- say I have SELECT WHATEVER FROM TABLE WHERE BLA = param
--if it returns at least one record set myflag to true;
END;Any idea?

Answer 1

THanks Satyaki_De,
However, when I put simple SELECT statement in the body of my procedure it does not compile. Actually I should have said that before. So here is my code and where it breaks:
create or replace procedure close_subjects(study_id varchar2)
AS
return_group boolean;
BEGIN
dbms_output.enable(1000000);
FOR current_group IN(
   SELECT DISTINCT group_id from groups WHERE study_id=study_id
) LOOP
   FOR current_subject IN(
      SELECT individual_id from groups WHERE group_id=current_group.group_id AND study_id=study_id
   ) LOOP
      return_group := true;
      SELECT INDIVIDUAL_ID FROM ASSIGN WHERE DATE_TIME_ASSIGNED = ( SELECT MAX(DATE_TIME_ASSIGNED) FROM ASSIGN WHERE INDIVIDUAL_ID = current_subject.individual_id ) AND                            ASSIGN_STATUS_ID = 'A';
     IF SQL%RowCount = 0 THEN
       return_group := false;
         dbms_output.put_line(current_subject.individual_id);
      END IF;
   END LOOP;
END LOOP;
END;
/If I comment out SELECT statement and leave dbms_output for testing purposes it works well. As I said I am faaaar from expert and seems to me that I cannot have SELECT in procedure BODY?