Select statement inside a loop in a Mysql Stored Procedure

Question

Can we use Select statement inside a loop in a Mysql Stored Procedure?

why is the code wrong

create procedure AbsentReportproc (INOUT fromdate DATET         


        

Answer 1

You didn't need a loop for this. You can do so:

SELECT
  p.CARDNO, 
  COUNT(CARDNO) AS countdate
FROM test_prefixmaster p
INNER JOIN test_prefixtransactions   t ON p.CARDNO = t.CARDNO
WHERE Date(t.S_DateTime) BETWEEN fromdate 
                             AND todate
GROUP BY p.CARDNO;