Select average sales count over 3 month period in MDX

Question

I have a problem with the following query:

Month to month comparison. Compare the sales of a current month with three other numbers: a. The previous month. b. The average of the previous three months. c. The average of the three month period before the previous 3 months.

Here is the structure of the database/cube: enter image description here

WITH MEMBER [Measures].[Current Month] AS 
    [Measures].[PIZZA SALES Count]
MEMBER [Measures].[Previous Month] AS
        AVG({[PIZZA SALES].[Time ID].Children * [TIME].    [Month].CurrentMember.lag(1)},[Measures].[PIZZA SALES Count]])

MEMBER [Measures].[3 Months] AS
        ((AVG({[PIZZA SALES].[Time ID].Children * [TIME].    [Month].CurrentMember.lag(1)},[Measures].[PIZZA SALES Count]]) +
         AVG({[PIZZA SALES].[Time ID].Children * [TIME].    [Month].CurrentMember.lag(2)},[Measures].[PIZZA SALES Count]]) +
         AVG({[PIZZA SALES].[Time ID].Children * [TIME].    [Month].CurrentMember.lag(3)},[Measures].[PIZZA SALES Count]]))/3)   

MEMBER [Measures].[6 Months] AS
        ((AVG({[PIZZA SALES].[Time ID].Children * [TIME].    [Month].CurrentMember.lag(4)},[Measures].[PIZZA SALES Count]]) +
         AVG({[PIZZA SALES].[Time ID].Children * [TIME].    [Month].CurrentMember.lag(5)},[Measures].[PIZZA SALES Count]]) +
         AVG({[PIZZA SALES].[Time ID].Children * [TIME].    [Month].CurrentMember.lag(6)},[Measures].[PIZZA SALES Count]]))/3)

    SELECT
    {
        [Measures].[Current Month],
        [Measures].[Previous Month],
        [Measures].[3 Months],
        [Measures].[6 Months]
    }
    ON COLUMNS,
    {
        [TIME].[Month].&[12]
    } ON ROWS
FROM [Pizza Place Cube];

The result from this query is as follows: enter image description here

The following SQL Script returns the corrects results:

SELECT
(SELECT COUNT(*) FROM PIZZA_SALES WHERE TimeID IN (
SELECT TimeID FROM TIME WHERE Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT     MAX(TimeID) FROM PIZZA_SALES))) AND
        Year = (SELECT Year FROM TIME WHERE TIMEID = (SELECT MAX(TimeID) FROM     PIZZA_SALES)))) AS 'CURRENT MONTH',
(SELECT COUNT(*) FROM PIZZA_SALES WHERE TimeID IN (
SELECT TimeID FROM TIME WHERE Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT     MAX(TimeID) FROM PIZZA_SALES)))-1 AND
        Year = (SELECT Year FROM TIME WHERE TIMEID = (SELECT MAX(TimeID) FROM     PIZZA_SALES)))) AS 'PREVIOUS MONTH',
(SELECT COUNT(*)/3 FROM PIZZA_SALES WHERE TimeID IN (
SELECT TimeID FROM TIME WHERE
        Year = (SELECT Year FROM TIME WHERE TIMEID = (SELECT MAX(TimeID) FROM     PIZZA_SALES)) AND
        (Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT MAX(TimeID) FROM     PIZZA_SALES)))-1 OR
        Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT MAX(TimeID) FROM     PIZZA_SALES)))-2 OR
        Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT MAX(TimeID) FROM     PIZZA_SALES)))-3))) AS '3 MONTHS',
(SELECT COUNT(*)/3 FROM PIZZA_SALES WHERE TimeID IN (
SELECT TimeID FROM TIME WHERE
        Year = (SELECT Year FROM TIME WHERE TIMEID = (SELECT MAX(TimeID) FROM     PIZZA_SALES)) AND
        (Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT MAX(TimeID) FROM     PIZZA_SALES)))-4 OR
        Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT MAX(TimeID) FROM     PIZZA_SALES)))-5 OR
        Month = (SELECT Month FROM TIME WHERE TIMEID = ((SELECT MAX(TimeID) FROM     PIZZA_SALES)))-6))) AS '6 MONTHS';

The desired results as returned by the SQL query are as follows: enter image description here

Pleas help, I have tried many different sollutions on the internet, however they do not return the correct results.

It seems that your results aren't shown in the question. Can you simplify the question to just start by comparing between current and *one* prior month, and then expand it to the averages? — N West, Oct 01 '13 at 14:33
The MDX query should return a:the sales of the current month, b: the sales of the previous month and c: the average of the last the months. The last part (d) should return results similar to (c) but for the 3 month period before the last 3 months. — thewikus, Oct 02 '13 at 08:44

score 1 · Answer 1 · answered Oct 08 '13 at 19:20

The following query should return what you want:

WITH MEMBER [Measures].[Current Month] AS 
    [Measures].[PIZZA SALES Count]
MEMBER [Measures].[Previous Month] AS
        ([TIME].[Month].CurrentMember.Lag(1),
         [Measures].[PIZZA SALES Count])

MEMBER [Measures].[3 Months] AS
        AVG([TIME].[Month].CurrentMember.Lag(3) : [TIME].[Month].CurrentMember.Lag(1),
            [Measures].[PIZZA SALES Count])   

MEMBER [Measures].[6 Months] AS
        AVG([TIME].[Month].CurrentMember.Lag(6) : [TIME].[Month].CurrentMember.Lag(4),
            [Measures].[PIZZA SALES Count])   

    SELECT
    {
        [Measures].[Current Month],
        [Measures].[Previous Month],
        [Measures].[3 Months],
        [Measures].[6 Months]
    }
    ON COLUMNS,
    {
        [TIME].[Month].&[12]
    } ON ROWS
FROM [Pizza Place Cube]

Note that Avg needs a set as the first argument, and the colon construct build a set starting with the member before the colon and ending with the member after it.

Select average sales count over 3 month period in MDX

1 Answers1