How to convert the query to function

Question

Please help to convert the below given query to a function :
SELECT
  ITEM_CODE, ITEM_NAME,
  ROUND(OPSTK/CNV/ML,2) OPSTK, ROUND(OPVAL,3)OPVAL,
  ROUND(INQTY/CNV/ML,2) INQTY, ROUND(INVAL,3) INVAL,
  ROUND(OUTQTY/CNV/ML,2) OUTQTY,ROUND(OUTVAL,3)OUTVAL,
  ROUND((NVL(OPSTK,0)+NVL(INQTY,0)-NVL(OUTQTY,0))/CNV/ML,2) CLSTK,
  ROUND((NVL(OPVAL,0)+NVL(INVAL,0)-NVL(OUTVAL,0)),3) CL_VAL
FROM
  SELECT ITEM_CODE, ITEM_NAME, IU_CONV_FACTOR CNV, IU_MAX_LOOSE_1 ML
  FROM   ITEM,ITEM_UOM
  WHERE  ITEM_CODE = IU_ITEM_CODE AND IU_UOM_CODE = ITEM_UOM_CODE
  SELECT SL_ITEM_CODE OP_ICODE,
         SUM(DECODE(RCVD_ISSD,'R',1,'I',-1)*QTY_BU) OPSTK,
         ROUND(SUM(DECODE(RCVD_ISSD,'R',1,'I',-1)*VAL_1),2) OPVAL
  FROM   STK
  WHERE  DT <  TO_DATE(:P249_DATE1,'DD-MM-YYYY')
  GROUP BY SL_ITEM_CODE 
  SELECT SL_ITEM_CODE TX_ICODE,
         SUM(DECODE(RCVD_ISSD,'R',1)*QTY_BU)INQTY,
         SUM(DECODE(RCVD_ISSD,'R',1)*VAL_1) INVAL,
         SUM(DECODE(RCVD_ISSD,'I',1)*QTY_BU)OUTQTY,
         SUM(DECODE(RCVD_ISSD,'I',1)*VAL_1) OUTVAL
  FROM   STK
  WHERE  DT BETWEEN TO_DATE(:P_DATE1,'DD-MM-YYYY')
  AND    TO_DATE(:P249_DATE2,'DD-MM-YYYY')
  GROUP BY SL_ITEM_CODE
WHERE ITEM_CODE = OP_ICODE(+)
AND   ITEM_CODE = TX_ICODE(+)
--AND   ITEM_CODE LIKE :P_ITEMCODE
ORDER BY ITEM_CODEYogesh

Answer 1

create or replace type typ_stk is object(
  ITEM_CODE number, ITEM_NAME varchar2(100) ,
  OPSTK number, OPVAL number,
  INQTY number ,  INVAL number,
   OUTQTY number ,OUTVAL number,
   CLSTK number,
   CL_VAL number
create or replace function fn_stk return typ_stk is
v_ITEM_CODE number;
v_ITEM_NAME varchar2(100) ;
v_OPSTK number;
v_OPVAL number;
v_INQTY number ; 
v_INVAL number;
v_OUTQTY number ;
v_OUTVAL number;
v_CLSTK number;
v_CL_VAL number;
begin
  select 1,'item',2,3,4,5,6,7,8,9 into
  v_ITEM_CODE ,
v_ITEM_NAME ,
v_OPSTK ,
v_OPVAL ,
v_INQTY , 
v_INVAL ,
v_OUTQTY ,
v_OUTVAL ,
v_CLSTK ,
v_CL_VAL
  from dual;
  return typ_stk(v_ITEM_CODE ,
                    v_ITEM_NAME ,
                    v_OPSTK ,
                    v_OPVAL ,
                    v_INQTY , 
                    v_INVAL ,
                    v_OUTQTY ,
                    v_OUTVAL ,
                    v_CLSTK ,
                    v_CL_VAL);
end fn_stk; 
select treat(fn_stk as typ_stk).item_code item_code,
       treat(fn_stk as typ_stk).ITEM_NAME ITEM_NAME,
       treat(fn_stk as typ_stk).OPSTK OPSTK,
       treat(fn_stk as typ_stk).OPVAL OPVAL,
       treat(fn_stk as typ_stk).INQTY  INQTY,
       treat(fn_stk as typ_stk).INVAL  INVAL ,
       treat(fn_stk as typ_stk).OUTQTY OUTQTY,
       treat(fn_stk as typ_stk).OUTVAL OUTVAL,
       treat(fn_stk as typ_stk).CLSTK CLSTK,
       treat(fn_stk as typ_stk).CL_VAL CL_VAL
  from dualare you expecting something like this ?