query for item onhand quantity & Lot wise query

SELECT  msi.segment1 item_name,mq.subinventory_code, b.SEGMENT1||'.'||b.SEGMENT2||'.'||b.SEGMENT3||'.'||b.SEGMENT4 locator,
SUM (mq.transaction_quantity) on_hand,msi.INVENTORY_ITEM_ID,msi.organization_id
    FROM apps.org_organization_definitions ood,
         apps.mtl_onhand_quantities mq,
         apps.mtl_system_items_b msi,
         mtl_item_locations b
   WHERE 1 = 1
     AND mq.organization_id = msi.organization_id
     AND ood.organization_id(+) = msi.organization_id
     AND mq.inventory_item_id = msi.inventory_item_id
     AND mq.locator_ID = b.Inventory_location_id
     --AND mq.inventory_item_id = b.Inventory_item_id
     --and mq.organization_id = b.Organization_id
     AND msi.segment1 = nvl(:P_ITEM_CODE,msi.segment1)
     and msi.organization_id=nvl(:p_organization_id,msi.organization_id)  
     and mq.subinventory_code=nvl(:p_subinvcode,mq.subinventory_code)
GROUP BY msi.segment1, ood.organization_name, mq.subinventory_code,msi.organization_id,msi.INVENTORY_ITEM_ID,b.SEGMENT1,b.SEGMENT2,b.SEGMENT3,b.SEGMENT4

============================Lotwise Query===============================

select --*
 moqd.ORGANIZATION_ID
,OOD.ORGANIZATION_NAME
,moqd.SUBINVENTORY_CODE
,msib.SEGMENT1 item
,SUM (moqd.primary_transaction_quantity) on_hand
,SUM (moqd.secondary_transaction_quantity) secondary_onhand
,msib.PRIMARY_UOM_CODE
,moqd.secondary_uom_code
,moqd.LOT_NUMBER
,(SELECT EXPIRATION_DATE FROM MTL_LOT_NUMBERS WHERE LOT_NUMBER=moqd.LOT_NUMBER
AND inventory_item_id =MOQD.inventory_item_id AND organization_id =MOQD.organization_id )LOT_EXPIRY_DATE
FROM
 mtl_onhand_quantities_detail moqd
,mtl_system_items_b msib
,ORG_ORGANIZATION_DEFINITIONS OOD
   WHERE 1 = 1
     --AND moqd.organization_id = 143
     /*AND moqd.subinventory_code = 'R DRY HALA'
     AND moqd.inventory_item_id = 9095
     AND moqd.owning_organization_id = 143
     AND moqd.planning_organization_id = 143*/
     AND moqd.INVENTORY_ITEM_ID=msib.INVENTORY_ITEM_ID
     AND moqd.organization_id=msib.organization_id
     AND OOD.organization_id=msib.organization_id
group by
moqd.ORGANIZATION_ID
,moqd.SUBINVENTORY_CODE
,msib.SEGMENT1  
,moqd.secondary_uom_code
,moqd.LOT_NUMBER
,msib.PRIMARY_UOM_CODE
,OOD.ORGANIZATION_NAME
,MOQD.inventory_item_id

=================Using API=====================================

create or replace function XXMADN_GET_OHQTY(
p_inv_item_id in varchar2,
p_org_id number,
p_qty_type          IN VARCHAR2
)
return number is

   x_return_status         VARCHAR2 (50);
   x_msg_count             VARCHAR2 (50);
   x_msg_data              VARCHAR2 (50);
   v_item_id               NUMBER;
   v_organization_id       NUMBER;
   v_qoh                   NUMBER;
   v_rqoh                  NUMBER;
   v_atr                   NUMBER;
   v_att                   NUMBER;
   v_qr                    NUMBER;
   v_qs                    NUMBER;
   v_lot_control_code      BOOLEAN;
   v_serial_control_code   BOOLEAN;
   L_QTY NUMBER;
BEGIN
   SELECT   inventory_item_id, mp.organization_id
     INTO   v_item_id, v_organization_id
     FROM   mtl_system_items_b msib, mtl_parameters mp
    WHERE       msib.inventory_item_id = p_inv_item_id
            AND msib.organization_id = mp.organization_id
            AND msib.organization_id =p_org_id; -- :organization_code;


   v_qoh := NULL;
   v_rqoh := NULL;
   v_atr := NULL;
   v_lot_control_code := FALSE;
   v_serial_control_code := FALSE;


   fnd_client_info.set_org_context (1);


   inv_quantity_tree_pub.query_quantities (
      p_api_version_number    => 1.0,
      p_init_msg_lst          => 'F',
      x_return_status         => x_return_status,
      x_msg_count             => x_msg_count,
      x_msg_data              => x_msg_data,
      p_organization_id       => v_organization_id,
      p_inventory_item_id     => v_item_id,
      p_tree_mode             => apps.inv_quantity_tree_pub.g_transaction_mode,
      p_is_revision_control   => FALSE,
      p_is_lot_control        => v_lot_control_code,
      p_is_serial_control     => v_serial_control_code,
      p_revision              => NULL,                          -- p_revision,
      p_lot_number            => NULL,                        -- p_lot_number,
      p_lot_expiration_date   => SYSDATE,
      p_subinventory_code     => NULL,                 -- p_subinventory_code,
      p_locator_id            => NULL,                        -- p_locator_id,
      p_onhand_source         => 3,
      x_qoh                   => v_qoh,                    -- Quantity on-hand
      x_rqoh                  => v_rqoh,         --reservable quantity on-hand
      x_qr                    => v_qr,
      x_qs                    => v_qs,
      x_att                   => v_att,               -- available to transact
      x_atr                   => v_atr                 -- available to reserve
   );

 IF
p_qty_type='OHQ' THEN --On Hand qty
L_QTY :=v_qoh; --v_QuantityOnhand;
ELSE IF
p_qty_type='ATR' THEN --Available to Reserve
L_QTY :=v_atr;
ELSE IF
p_qty_type='ATT' THEN --Available to Transact
L_QTY :=v_att;
END IF;
END IF;
END IF;

 return L_QTY;
 --return v_atr;

   DBMS_OUTPUT.put_line ('On-Hand Quantity: ' || v_qoh);
   DBMS_OUTPUT.put_line ('Available to reserve: ' || v_atr);
   DBMS_OUTPUT.put_line ('Quantity Reserved: ' || v_qr);
   DBMS_OUTPUT.put_line ('Quantity Suggested: ' || v_qs);
   DBMS_OUTPUT.put_line ('Available to Transact: ' || v_att);
   DBMS_OUTPUT.put_line ('Available to Reserve: ' || v_atr);


EXCEPTION
   WHEN OTHERS
   THEN
      DBMS_OUTPUT.put_line ('ERROR: ' || SQLERRM);
END XXMADN_GET_OHQTY;

select XXMADN_GET_OHQTY(183645,1404,'OHQ')from dual