How to select max or latest date & time from Data list

Here arised some question. How can I get the max updated date and time of that image which is shown as first (using ESS_ENTDATE and ESS_ENTTIME)?

This's first procedure and results.

PROCEDURE PR_GETORDERSTATUES(CUR_OUTPUT OUT H_CURSOR)

    IS

    BEGIN

      OPEN CUR_OUTPUT FOR SELECT C.CUSTOMERID,C.CUSTOMERNAME,C,CITY,

                                 B.ORDERDETAILID, O.ORDERID,B.QUANTITY,

                                 O.ORDERDATE,O.ORDERTIME,S.STATUS

            FROM M_CORRSQL.O_CUSTOMER C,M_CORRSQL.ORDERS O,M_CORRSQL.ORDERDETAILS B,M_CORRSQL.O_STATUS S

                           WHERE O.ORDERID = B.OORDERID

                             AND C.CUSTOMERID = O.OCUSTOMERID

                             AND O.ORDERID = S.ORDERID;

END PR_GETORDERSTATUES;

Then found good solution and try it. The Following procedure and max or latest date and time.

PROCEDURE PR_GETORDERSTATUES(CUR_OUTPUT OUT H_CURSOR)

    IS

    BEGIN

   OPEN CUR_OUTPUT FOR SELECT S.* FROM(SELECT C.CUSTOMERID,C.CUSTOMERNAME,C.CITY,

                                              B.ORDERDETAILID, O.ORDERID,B.QUANTITY,

                                              O.ORDERDATE,O.ORDERTIME,S.STATUS

                                         FROM M_CORRSQL.O_CUSTOMER C,M_CORRSQL.ORDERS O,M_CORRSQL.ORDERDETAILS B,M_CORRSQL.O_STATUS S

                                        WHERE O.ORDERID = B.OORDERID

                                          AND C.CUSTOMERID = O.OCUSTOMERID

                                          AND O.ORDERID = S.ORDERID

                                     ORDER BY TO_DATE(O.ORDERDATE||' '||O.ORDERTIME,'DD/MM/YYYY HH:MI AM') DESC)S

                                        WHERE ROWNUM = 1;

END PR_GETORDERSTATUES;

Also, found another solution for get max or latest date and time.

PROCEDURE PR_GETORDERSTATUES(CUR_OUTPUT OUT H_CURSOR)

    IS

    BEGIN

      OPEN CUR_OUTPUT FOR SELECT C.CUSTOMERID,C.CUSTOMERNAME,C.CITY,

                                 B.ORDERDETAILID, O.ORDERID,B.QUANTITY,

                                 O.ORDERDATE,O.ORDERTIME,S.STATUS

                            FROM M_CORRSQL.O_CUSTOMER C,M_CORRSQL.ORDERS O,M_CORRSQL.ORDERDETAILS B,M_CORRSQL.O_STATUS S

                           WHERE O.ORDERID = B.OORDERID

                             AND C.CUSTOMERID = O.OCUSTOMERID

                             AND O.ORDERID = S.ORDERID

                             AND O.ORDERDATE = (SELECT MAX(O.ORDERDATE) FROM M_CORRSQL.ORDERS O)

                             AND O.ORDERTIME = (SELECT MAX(O.ORDERTIME) FROM M_CORRSQL.ORDERS O);

END PR_GETORDERSTATUES;