I have a fact table which stores for each record an init_year and end_year as integers, which refer to the year range in which the record is valid.
In which way I can design a MDX query to select my measures (count) for each year, in order to have a trend of my measures over year?
THANKS
I'm not sure this should be done in MDX.
This sort of thing is usually calculated in the fact tables (linked to a dimension table of all available years), and a new measure is created. No calculation would be done in MDX; you'd just display the new measure.
Having said that, I've just Googled "MDX count start end date" and found www.purplefrogsystems.com/blog/2013/04/mdx-between-start-date-and-end-date which suggests you use the LINKMEMBER function. Their example code was...
AGGREGATE(
{NULL:LINKMEMBER([DATE].[Calendar].CURRENTMEMBER
,[START DATE].[Calendar])}
* {LINKMEMBER([DATE].[Calendar].CURRENTMEMBER
, [END DATE].[Calendar]):NULL}
, [Measures].[Project COUNT])
...or...
AGGREGATE({NULL:[DATE].[Calendar].CURRENTMEMBER}
, [Measures].[Project COUNT])
...but it needs careful reading!
Related
This is a question regarding SSAS Cubes, MDX formulas and Power BI.
I have a measure with the active members per each month. So when I select for example 2018 it shouldn´t aggregate but return the last available month with active members, and if I break down by month it should give the active members for each month.
So I have this formula which works almost fine if querying in MS Management Studio:
with member [Measures].[Last existing SOCIOS] AS
Max(
EXISTING [DIM FECHA].[Jerarquía].[MES NOMBRE].members,
iif([Measures].[ACTIVOS] = 0,null,
[Measures].[ACTIVOS])
)
select {[Measures].[Last existing SOCIOS]} on columns,
[DIM FECHA].[MES NOMBRE].members on rows
from [cubo_Compromisos]
where [DIM FECHA].[AÑO].&[2018]
I would prefer to have the november value returned at the 'All' level. But this is not my main problem. The real issue is that when I use this measure in Power BI it behaves differently: when selecting multiple months it ignores the selected values and just returns the last value for the whole year.
In the screenshot below I have added the value returned by the KPI Card because that is the value that I want returned:
If I select items like this it does it right, but I need it to select all months, and not just one because I am using this measure along others:
Does anyone know the right MDX function to use or an alternative?
Edited: 23-11-2018
It does the same in a Pivot Table connected to a SSAS Cube.When I add the date dimension to the table it works fine. But when using the date dimension and filtering it without the dimension added as rows it returns the value for the whole year.
The function you are looking at is LastChild. Last Child on the upper level of the hierarchy will return the value you are looking at.
I think that function can be used in the Cube design in SSAS - then this will be the standard behavior. If you want to do it with a query you need to do something like:
SELECT [Date].[Fiscal].[Fiscal Quarter].[Q1 FY 2002].LastChild ON 0
FROM [Adventure Works]
To get the last month of the 1st quater (I used example from microsoft and another post on the subject )
Would much appreciate any help on this.
I have a measure called "Sales" populated with values, however i am trying to turn the "Sales" value to 0, whenever the "Sales Flag" is set to 0.
Important Note: The Sales Flag is based on Date (lowest level of detail).
The difficulty that i am really experiencing and cant get a grip on, is how i am trying the display the MDX outcome.
As explained above, i would want to make the "Sales" value 0 whenever we have a 0 in the "Sales Flag" (which is based on the Date), but when I run the MDX Script I would wan't on the ROWS to NOT display the Date, but instead just the Week (higher Level to Date), as below shows:
I really have spent hours on this and can't seem to understand how we can create this needed custom Sales measure based on the Sales Flag on the date level, but having the MDX outcome display ROWS on Week level.
Laz
You need to define the member in the MDX before the select. Something like that:
WITH MEMBER [Measures].[Fixed Sales] as IIF([Sales Flag].currentMember=1,[Sales], 0)
SELECT [Measures].[Fixed Sales] on 0, [Sales Flag] on 1 from [Cube]
I am writing the code without SSAS here so it might not be the 100% correct syntax but you can get the general idea ;)
You can add the iif in the SELECT part but I find creating member to be the cleaner solution.
SELECT IIF([Sales Flag].currentMember=1,[Sales], 0) on 0, [Sales Flag] on 1 from [Cube]
If you have a control over the cube in SSAS you can create a calculated member there and you can access it easier.
Glad to hear if Veselin's answer works for you, but if not...
Several approaches are also possible.
Use Measure expression for Sales measure:
Use SCOPE command for Day level (if it's Key level of Date dimension). If it's not a key level you have to aggregate on EVERY level (week, year etc) to emulate AggregateFunction of Sales measure but with updated behavior for one flag:
SCOPE([Date].[Your Date Hierarchy].[Day].members,[Measures].[Sales]);
THIS=IIF([Sales Flag].CurrentMember = 1,[Measures].[Sales],0);
END SCOPE;
Update logic in DSV to multiply Sales column by SalesFlag. This is the easiest way from T-SQL perspective.
I've build a MDX calc member that give me the year-to-date (YTD) for budget, however if the user selects multiple months, it returns the total for year. Which I believe is CurrentMember function, but how do it I get the max from the set?
Aggregate(
PeriodsToDate(
[Date].[Fiscal].[Fiscal Year]
,[Date].[Fiscal].CurrentMember
)
,[Measures].[Budget]
)
So when we have a month slicer to select the month, if the end-user selects more then 1 month, then the CurrentMember fails and the parent is used, so the Full Year (FY) is used.
It might be very late to answer this question but hopefully someone else can benefit with the answer.
for this particualr problem you have to create a dynamic set and apply scope to that. check the below MDX.
dynamic set : existing PeriodsToDate(Date].[Fiscal].[Fiscal Year],[Date].
[Fiscal].CurrentMember)
calcualted member : Aggregate( PeriodsToDate( [Date].[Fiscal].[Fiscal Year]
,[Date].[Fiscal].CurrentMember
)
,[Measures].[Budget]
)
apply scope to it scope (Date].[Fiscal].[Fiscal Year],,[Measures].[Budget])
this = aggregate (([dynamic set],],[Measures].[Budget])
end scope
this way u can select a date range without any problem
Kind Regards
mah
New to MDX and a bit bewildered...
We have a cube with an excel pivot table over the top for reporting. What I need to provide is an easy means for people to see the max (last) member of the relevant date dimension when also sliced against another dimension, and the row count on that day.
I have a "booking count" measure and I want to see the number of bookings on the last date I had any bookings for any other dimensions children. If that makes sense.
The closest i've got so far is this:
select [Measures].[Booking Count] on 0, filter(([Sub Channel].[Channels].[Channel].members, [Booking Date].[Date].children), not isempty([Measures].[Booking Count])) on 1 from myCube
But I can't then use LastChild or similar to get the last member of each channel.
Hope that makes sense! Huge thanks in advance for any help.
You are nearly there, just use the Tail function to get the last date from your set:
select [Measures].[Booking Count]
on 0,
Tail(filter(([Sub Channel].[Channels].[Channel].members, [Booking Date].[Date].children),
not isempty([Measures].[Booking Count])))
on 1
from myCube
I'm relatively new to MDX (in the process of ordering a book just now) and having a crack at creating a calculated measure, which should sum a value from one of my Fact tables, based on a set range of dates (from my Time dimension) which should be filtered by an attribute from another dimension. Unfortunately, I seem to have gotten myself in a bit of a situation and can't see a clear way out. I looked through other similar questions but didn't see any trying to do this same thing, only single dimension measures.
I have a Measure Group, which contains the physical measure SourceMeasure.
I have a Time dimension, named [Time], which I want to use to specify my range for the calculation. This is related to the above measure group by my Date Key.
I have an Account dimension, named [Dim Account], which contains two date attributes: [Account Start Date] and [Account End Date]. This is related to the above measure group via an Account ID.
What I'm trying to do, is filter the [Time] dimension to a range based on the [Account Start Date] and [Account End Date], and return the sum of [SourceMeasure] for the period specified for that account.
Obviously, this will be different for each account, so shouldn't be aggregated, except by the [Dim Account] dimension (perhaps returning 0 or null if not applied).
Example test expression below, this is currently not working due to an error with the FORMAT_STRING syntax (according to MDX Studio).
WITH
MEMBER [Measures].[LifetimeMeasure] AS
Sum
(
{
StrToMember
(
"[Time].[Date].&["
+ Format([Dim Account].[Account Start Date].CurrentMember.MemberValue,"yyyy-MM-ddThh:mm:ss")
+ "]"
)
:
StrToMember
(
"[Time].[Date].&["
+ Format([Dim Account].[Account End Date].CurrentMember.MemberValue,"yyyy-MM-ddThh:mm:ss")
+ "]"
)
}
,[Measures].[SourceMeasure]
)
SELECT
{
[Measures].[LifetimeMeasure]
,[Measures].[SourceMeasure]
}
ON COLUMNS
,{
[Dim Account].[Account].[AccountName]
}
ON ROWS
FROM
[MyCube]
I've tried a few different approaches (SCOPE, Filter, IIF) but every time I seem to get back to the same sticking point - how to filter the [Time] dimension based on the value of the [Dim Account] start and end dates.
Now, it may be that I'm completely misunderstanding how the relationships work between the dimensions and/or how calculated measures are computed by SSAS but I'm not yet at a level where I'm sure what to look for, so I'm going round in circles.
Is what I'm trying to do possible, and if so, any pointers as to where to look to help me figure out where I'm going wrong? Should I perhaps be looking to use a Calculation Dimension instead?
I hope this all makes sense, let me know if I've missed anything or if more detail is required. I'm testing using MDX Studio.
I found the error by adding the CONSTRAINED flag to the StrToMember function.
It seems that my [Time] dimension's date entries have defaulted to the time "00:00:00" while my [Dim Account] dimension's date entries have defaulted to "12:00:00". It looks like a mismatch between 24-hour and 12-hour clock. My date fields on the [Dim Account] dimension are marked as "Regular", not "Date" due to the fact that the dimension isn't a natural time dimension. I think it's potentially this that's causing the mismatch.
To workaround the issue for now, I've removed the Time format from my Format expression and just appended the "00:00:00" to the string while I search for the root cause. I'll update once I've solved it.
UPDATE: The cause of the mismatch is not in the dimension, but in the format string I've used in the StrToMember expression. It's not documented on MSDN, but the following string outputs 12-hour time format:
"yyyy-mm-ddThh:mm:ss"
While this string outputs 24-hour time format:
"yyyy-mm-ddTHH:mm:ss"