Convert this query from Ms Access to Oracle?

Question

How in the hole world can do this query in oracle?
TRANSFORM Sum(NET_SALES) AS SALES
SELECT YEAR_MONTH
FROM TBLCUSTOMER
WHERE (CUSTOMER=2083 Or CUSTOMER=1035 Or CUSTOMER=2097)
AND YEAR_MONTH Between 200709 And 200801
GROUP BY YEAR_MONTH
ORDER BY YEAR_MONTH
PIVOT CUSTOMER;

Answer 1

Like this perhaps:
SQL> ed
Wrote file afiedt.buf
  1  WITH t AS (SELECT TO_DATE('01/01/2008','dd.mm.yyyy') AS dt, 1 AS emplid, 100 as sales FROM dual UNION ALL
  2             SELECT TO_DATE('01/01/2008','dd.mm.yyyy'), 1, 200 FROM dual UNION ALL
  3             SELECT TO_DATE('01/02/2008','dd.mm.yyyy'), 2, 300 FROM dual UNION ALL
  4             SELECT TO_DATE('01/06/2008','dd.mm.yyyy'), 2, 400 FROM dual UNION ALL
  5             SELECT TO_DATE('01/03/2007','dd.mm.yyyy'), 2, 500 FROM dual UNION ALL
  6             SELECT TO_DATE('01/05/2007','dd.mm.yyyy'), 3, 600 FROM dual UNION ALL
  7             SELECT TO_DATE('01/02/2008','dd.mm.yyyy'), 3, 700 FROM dual UNION ALL
  8             SELECT TO_DATE('01/12/2008','dd.mm.yyyy'), 3, 800 FROM dual)
  9  -- END OF TEST DATA
10  select year, month, emp_1_sales, emp_2_sales, emp_3_sales
11  from (
12        select extract(year from dt) as year, extract(month from dt) as month,
13               sum(decode(emplid, 1, sales, 0)) as emp_1_sales,
14               sum(decode(emplid, 2, sales, 0)) as emp_2_sales,
15               sum(decode(emplid, 3, sales, 0)) as emp_3_sales
16        from t
17        group by extract(year from dt), extract(month from dt)
18       )
19* order by emp_3_sales desc, emp_2_sales desc, emp_1_sales desc
SQL> /
      YEAR      MONTH EMP_1_SALES EMP_2_SALES EMP_3_SALES
      2008         12           0           0         800
      2008          2           0         300         700
      2007          5           0           0         600
      2007          3           0         500           0
      2008          6           0         400           0
      2008          1         300           0           0
6 rows selected.
SQL> ed
Wrote file afiedt.buf
  1  WITH t AS (SELECT TO_DATE('01/01/2008','dd.mm.yyyy') AS dt, 1 AS emplid, 100 as sales FROM dual UNION ALL
  2             SELECT TO_DATE('01/01/2008','dd.mm.yyyy'), 1, 200 FROM dual UNION ALL
  3             SELECT TO_DATE('01/02/2008','dd.mm.yyyy'), 2, 300 FROM dual UNION ALL
  4             SELECT TO_DATE('01/06/2008','dd.mm.yyyy'), 2, 400 FROM dual UNION ALL
  5             SELECT TO_DATE('01/03/2007','dd.mm.yyyy'), 2, 500 FROM dual UNION ALL
  6             SELECT TO_DATE('01/05/2007','dd.mm.yyyy'), 3, 600 FROM dual UNION ALL
  7             SELECT TO_DATE('01/02/2008','dd.mm.yyyy'), 3, 700 FROM dual UNION ALL
  8             SELECT TO_DATE('01/12/2008','dd.mm.yyyy'), 3, 800 FROM dual)
  9  -- END OF TEST DATA
10  select extract(year from dt) as year, extract(month from dt) as month,
11         sum(decode(emplid, 1, sales, 0)) as emp_1_sales,
12         sum(decode(emplid, 2, sales, 0)) as emp_2_sales,
13         sum(decode(emplid, 3, sales, 0)) as emp_3_sales
14  from t
15  group by extract(year from dt), extract(month from dt)
16* order by 5 desc, 4 desc, 3 desc
SQL> /
      YEAR      MONTH EMP_1_SALES EMP_2_SALES EMP_3_SALES
      2008         12           0           0         800
      2008          2           0         300         700
      2007          5           0           0         600
      2007          3           0         500           0
      2008          6           0         400           0
      2008          1         300           0           0
6 rows selected.
SQL>If you meant something different, you'd better give an example of how you expect the output to be.