Problem to the script

Here is the error

 
You have an error in your SQL syntax; check the manual that corresponds to your
MySQL server version for the right syntax to use near '%m-%d %H:%i:%s') as in_ti
me_dscr,  date_format(p.stockout_time,'%Y-%m-%d %H:%i:%' at line 1
 

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got within VS, while this is the script
 

                sql = @"select " +
                    " null as row_num, " +
                    " date_format(p.in_time,'%Y-%m-%d %H:%i:%s') as in_time_dscr, " +
                    " date_format(p.stockout_time,'%Y-%m-%d %H:%i:%s') as stockout_time_dscr, " +
                    " date_format(ADDDATE(p.store_rcv_time, " + package_expiry_day_vg.ToString() + "), '%c月%e日') as expiry_date_chi, " +
                    " date_format(ADDDATE(p.store_rcv_time, " + package_expiry_day_vg.ToString() + "), '%D %b') as expiry_date_eng, " +
                    " c_s.sms_addr_eng, " +
                    " c_s.sms_addr_chi, " +
                    " c_s.store_no, " +
                    " p.*  " +
                    " from package_vg p  " +
                    " left join c_store_vg c_s on c_s.dscr = p.store_dscr " +
                    " where p.deleted = '0' " +
                    " and (p.phone like '9%' or p.phone like '6%' or p.phone like '5%') " +
                    " and length(trim(p.phone)) = 8 " +
                    " and c_s.send_sms = 1 " +
                    " and (p.status = 'store_rcv' or p.status = 'store_app_rtn') " +
                    " and p.sms_send = 0 " +
                    " and date_format(p.store_rcv_time,'%Y-%m-%d') >= " + DBUtil.GetSqlString(From_Date.ToString(DBUtil.DATE_FORMAT)) + " " +
                    " and date_format(p.store_rcv_time,'%Y-%m-%d') < " + DBUtil.GetSqlString(To_Date.ToString(DBUtil.DATETIME_FORMAT)) + " " +
                    " order by p.id";
					

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why?