Need to validate a string if the string entered is alphanumeric and contains spaces or not?

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• How do I know the cursor for loop host variable contains data or not

  Hi all
  
  
  can someone tell me how to know cursor variable host loop for contains data or not.
  
  
  example:
  Start
  for curr_rec in (select * from double)
  loop
  
  dbms_output.put_line(curr_rec%ROWCOUNT);
  
  end loop;
  
  
  end;
  
  The following oracle error message is coming:
  
  ORA-06550: line 5, column 27:
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  Please help me.
  
  Thank you and best regards,
  Prakash P
  
  Published by: 833560 on April 19, 2011 21:57

  833560 wrote:
  Hi all

  can someone tell me how to know cursor variable host loop for contains data or not.

  example:
  Start
  for curr_rec in (select * from double)
  loop

  dbms_output.put_line(curr_rec%ROWCOUNT);

  end loop;

  end;

  The following oracle error message is coming:

  ORA-06550: line 5, column 27:
  PLS-00324: cursor attribute can only be applied to non slider "CURR_REC."

  Please help me.

  Thank you best regards &,.
  Prakash P

  Published by: 833560 on April 19, 2011 21:57

  You know, in your code curr_rec is not slider.
  You cannot use curr_rec % rowcount
  If you want to get the number of lines of your loop, then use an additional variable

  Try this please

  declare
   countLoop NUMBER :=0;
  begin
    for curr_rec in( select * from dual)
    loop
      countloop := countloop + 1;
  
    end loop;
    dbms_output.put_line(countloop);
  end;
  

  or

  DECLARE
          CURSOR csr_org IS
                SELECT empno, ename FROM   emp;
                num_total_rows NUMBER;
        BEGIN
                FOR idx IN csr_org LOOP
                    dbms_output.put_line(idx.empno||' '||idx.ename);
                    num_total_rows := csr_org%ROWCOUNT;
                END LOOP;
                IF num_total_rows > 0 THEN
                  dbms_output.new_line;
                  dbms_output.put_line('Total Organizations = '||to_char(num_total_rows));
                END IF;
     END;
   /
  

  Published by: Mahir M. Quluzade, April 20, 2011 10:19