I'm a real newbie to MDX.
I'm trying to learn/get my head around how to create a new measure taking an existing measure and put against next date e.g.
Sales:
20190101 Qty 100
20190102 Qty 40
new measure to show
20190102 Qty 100
20190103 Qty 40
I've tried this:
create member currentcube.[Measures].[Qty Previous]
as
([Dim Date].[Date ID].currentmember.prevmember,[Measures].[Qty]);
Which does work but only when Date Dimension is used.
The existing Sales measure will work with any dimension (Time, Product, Location), how can I do this?
If you are not explicitly using a Date member your existing measures will be aggregating at the All level.
you can fix that in your usage dimension in VS
Related
I am working on a simple project using SSAS Cube on SQL Server 2016 and SSDT2015. DW_Orders database is from Orders DW. The table factor orders contains attributes UnitPrice, Quantity and Discount with the calculation member TotalSale defined as [Measures].[Unit Price][Measures].[Quantity](1-[Measures].[Discount]), well as the FK members CustomerID and OrgID. I want to get the TotalSale based on Country-City Hierarchy from dimension dimCustomers. But I got the following result:
enter image description here
it is obvious that the UnitPrice, Quantity and Discount have been summed under the city or country so that we got wrong and negative result of TotalSale from the calculation. Tried in the Edit Measure, cannot get what I expect. Need your help on some settings, thanks.
You need to edit the aggregation type for the 2 measures(discount and unit price). By default, the type is SUM, you need to use Average. To do that, go to the measure group, select the measure and access its properties to set the aggregation.
I'm creating a cube whose stock values should only conclude the last day each month's balance and value.
Hence, I've created the following Query in SSMS:
Create table #theStockTable(
Stock int,
StockValue INT,
DateKey int
)
INSERT INTO #theStockTable
VALUES(3,5, 20170211),
(3,5,20170228),
(1,4,20170331),
(1,4,20170330)
SELECT CAST(CONVERT(varchar, DateKey, 112) AS numeric(8, 0)) AS DateKey, SUM(Stock) AS [CL Stock], SUM(StockValue) AS [CL Stock Value]
FROM #theStockTable
WHERE CONVERT(date, CONVERT(varchar(10), DateKey)) = eomonth(CONVERT(date, CONVERT(varchar(10), DateKey)))
GROUP BY DateKey
In SSMS this returns the correct values:
DateKey CL Stock CL Stock Value
20170228 3 5
20170331 1 4
However, when I create an OLAP cube using SSAS, and use the Query above as the Named Query for my fact table #theStockTable and the same Query as my only partition of the same fact table and deploy and execute the cube, I have a situation where I get different values on each day of every month, but I only want to have the values for each month's last day.
I have used New Project.. -> Import from Server (multidimensional model or data mining model) in SSAS. It is important that the users must be able to browse the cube as they presently do.
The cube whose meta data I have copied contains every day's values on the stock table. May there be some metadata change I need to make in addition to the Query modification I have done in Edit named Query.. in Data Source View and replacing the old Query in the partition with my new Query?
Hopefully someone can shed some light into this.
EDIT
To clarify my request, some users of the cube has explained that it is rather slow to browse in for instance Excel, mainly because my Stock measure is much bigger than it is required to be. As it is now, it returns every StockValue and Stock of each product and each day. I want to only include the total balance of StockValue and Stock of the last day of the month. All other stock values are redundant.
For instance, browsing my DimDate dimension table with the measurements Stock and StockValue should have this return set:
DateKey Stock StockValue
20170131 0 0
rather than the whole return set which is returned now:
DateKey Stock StockValue
20170101 3 5
20170102 4 6
20170103 1 1
20170131 0 0
I think you already had a date dimension in your cube, if yes, then follow these steps:
Add an additional attribute [IsLastDay] with value 0/1 in the date dimension to indicate if the current date record is the last day of that month or not.
2.Add a calculate measure [CalStock] with this formular:
([Measures].[StockValue],[Date].[IsLastDay].&[1])
3.Fire this query to return the expected result:
select {[CalStock]} on 0,
non empty{[Date].[Date].[Date]} on 1
from [YourCube]
I have a multidimensional cube that needs a custom measure that I'm not sure how to build.
That data looks like this:
MemberID-----Date-------EventType
1--------------1/1/2016-------1
2--------------1/1/2016-------2
3--------------2/1/2016-------1
2--------------2/1/2016-------2
4--------------2/1/2016-------2
There is a count measure in the cube, but others can be added if needed. I need to create a measure that will use whatever filters the user applies and then count the EventType (1 and 2 only) by month, divide the resulting counts for EventType 1 into the count for EventType 2 (for each month individually), and finally sum the monthly results. For example 1/1/2016 would be 1/1=1 (count of EventType 1 and count of EventType 2) and 2/1/2016 would be 1/2=0.5 so the resulting measure value for the two months would be 1+0.5=1.5. Any help is greatly appreciated.
Let's assume you have a Date dimension with an attribute called Month. And let's assume you have an EventType dimension. And let's assume you have a count measure in your measure group called Cnt. Here's what else you need to do.
First, go to the DSV and add a new calculated column to the fact table which is called NullInt and is the following expression:
cast(null as int)
Then create a new Sum measure in your measure group off that column and call the measure My Rollup. Under the Source property, change NullHandling to Preserve so that it will start off null.
To explain why we're doing this, a scoped assignment to a physical measure will aggregate up. (If you assign a value to a physical measure at the grain of each month, then it will rollup to the grand total.) But a scoped assignment to a calculated measure doesn't roll up.
Then in your MDX script add the following calculations:
scope([Date].[Month].[Month].Members); //calculate at the month level then rollup
[Measures].[My Rollup] = DIVIDE(
([Event Type].[Event Type].&[1],[Measures].[Cnt]),
([Event Type].[Event Type].&[2],[Measures].[Cnt])
);
end scope;
Note that your version of SSAS probably has the DIVIDE function if it's AS2012 with the latest service pack or newer. But if it doesn't, you can always do division the old fashioned way as IIF(denom=0,null,num/denom).
This is a slight modification of what I stumbled upon while searching the web:
Let's say I have a dimension PROJECTS which contains:
project_id - unique id
category - category of a cost
project_date - date of summing up the cost
My warehouse also has the dimension of TIME with date, and a dimension COSTS containing values of costs. Those three dimensions are connected by the measure group EXPENSES which has:
id_date
id_cost
id_project
I want to wirte an MDX query which would group the projects by their category, and sum up all the costs, but only those which do not exceed the date given in the project_date attribute of the dimension PROJECTS (each category has the same project_date, I know it's redundant but I can't change it..)
I'm not sure, but maybe something alongside this?
SELECT
[COSTS].[COST] ON 0,
[PROJECTS].[category] ON 1
FROM [CUBE]
WHERE
[PROJECTS].[project_date] < #project_date
I'm trying to add a new measure to my OLAP cube, in SSAS.
The fact table is at the order detail level, so each row in the fact table represents an order and a product, like:
I'd like to add a measure that indicates the maximum number of days overdue per order number. So that measure should say:
OrderNo 1 -> 5 days overdue
OrderNo 2 -> 1 day overdue
OrderNo 3 -> 0 days overdue
I have tried using the MAX operator, with no success.
By the way, this is a multidimensional SSAS schema. I'm using SQL Server 2008.
Thanks in advance!
Just define a measure "max days overdue" or how ever you want to call it in the cube designer, tab "cube structure". In the properties of the measure, use "Max" as the aggregate function. That's it.