Sql queries for date and year

Question

Hi Friends,
I Have a view named - item_sales with 4 column
Item code
Item name
Transaction_YYYYMM (Date stored in YYYYMM format )
QTY_RECEIVED
QTY_SOLD
Sample data is
ITEM_CODE ITEM NAME  TRANSACTION_YYYMM     QTY_RECD    QTY_SOLD
AX             TSHIRT                201307                             3000               2000
AX             TSHIRT                201308                             2000               500
AX             TSHIRT                201309                             1000              3000
CX             XLSHIRT              201307                              3000             2000
CX             XLSHIRT              201308                              3000             2500
CX             XLSHIRT             201309                               3000             2500
EVERY MONTH END I WILL RUN THIS QUERY TO FIND OUT THE BELOW DETAILS
1. TO FIND ITEM_NAME WISE  -  QTY_RECEIVED AND QTY_SOLD ( FOR CURRENT MONTH - EXAMPLE SEP )
2. TO FIND ITEM_NAME WISE  -  QTY_RECEIVED AND QTY_SOLD   (FOR CURRENT YEAR EXAMPLE FROM JAN TO SEP )
OUTPUT FOR SEPTEMBER MONTH LOOK LIKE THIS
                                                        SEP-MONTH                              JAN TO SEP
ITEM_CODE   ITEM_NAME    QTY_RECEIVED  QTY_SOLD      QTY_RECEIVED  QTY_SOLD
AX                TSHIRT                   1000                 3000                 6000                 5500
CX                XLSHIRT                  3000                2000                 9000                 7000
Pls advise me how to write queries for this
Rdk

Answer 1

Just FYI, you *can* edit your own posts, you know
Rdk wrote:
Transaction_YYYYMM (Date stored in YYYYMM format )
First "problem". Don't store dates as string. Store them as dates. It will save you so much headache don't the road you won't believe it.
True, this is a view, so maybe not as critical - assuming the underlying *DATA* is actually a date.
1. TO FIND ITEM_NAME WISE  -  QTY_RECEIVED AND QTY_SOLD ( FOR CURRENT MONTH - EXAMPLE SEP )
2. TO FIND ITEM_NAME WISE  -  QTY_RECEIVED AND QTY_SOLD   (FOR CURRENT YEAR EXAMPLE FROM JAN TO SEP )
So yeah, based on these requirements, I'd recommend you make that column a DATE, not a string. Dates are easier to parse for date-related logic - such as month by month as you need here.
Using that, here's one way to do it:
with w_data as (
      select 'AX' item_code, 'TSHIRT ' item_name, to_date('20130701','yyyymmdd') trans_dt, 3000 qty_recd, 2000 qty_sold from dual union all
      select 'AX'          , 'TSHIRT '          , to_date('20130801','yyyymmdd')         , 2000         , 500           from dual union all
      select 'AX'          , 'TSHIRT '          , to_date('20130901','yyyymmdd')         , 1000         , 3000          from dual union all
      select 'CX'          , 'XLSHIRT'          , to_date('20130701','yyyymmdd')         , 3000         , 2000          from dual union all
      select 'CX'          , 'XLSHIRT'          , to_date('20130801','yyyymmdd')         , 3000         , 2500          from dual union all
      select 'CX'          , 'XLSHIRT'          , to_date('20130901','yyyymmdd')         , 3000         , 2500          from dual
   w_base as (
      select item_code, item_name, trans_dt, qty_recd, qty_sold,
             sum(qty_recd) over (partition by item_code, trunc(trans_dt, 'MM')) mm_recd,
             sum(qty_sold) over (partition by item_code, trunc(trans_dt, 'MM')) mm_sold,
             sum(qty_recd) over (partition by item_code, trunc(trans_dt, 'YY')) yy_recd,
             sum(qty_sold) over (partition by item_code, trunc(trans_dt, 'YY')) yy_sold,
             row_number() over (partition by item_code order by trans_dt desc) rnum
        from w_data d
Select item_code, item_name, mm_recd, mm_sold, yy_recd, yy_sold
  from w_base
where rnum = 1
IT ITEM_NA    MM_RECD    MM_SOLD    YY_RECD    YY_SOLD
AX TSHIRT        1000       3000       6000       5500
CX XLSHIRT       3000       2500       9000       7000