here is my case. I have small training in creating OLAP cube in SSAS and as part of it I need to calculate median time from creation issue to resolve issue.
So according to microsoft docs I should use MEDIAN function in MDX. So here is my code:
MEDIAN([Issue].[Issue ID],[Measures].[Hours Resolved])
Short explanation: [Measures].[Hours Resolved] it's a measure calculated in database from dimensions "resolved issue time" - "creation issue time" with DATEDIFF function. Both are smalldatetime datatype.
And it looks like it works in proper way for case on the screen below.
Exept "Grand Total" value in Mediana column.
I believe that Grand Total value should be 12 becasue this is proper score according to way the median should be calculated (checked also in Excel). So am I wrong here and this is proper behaviour? Or maybe I miss something in my calculation or configuration in SSAS?
Second case in this exercise.
When I will add for example Group Name column like on the picture below:
In my understanding value mediana column for let's say CRM part should be 9.
Can you please guide me if I'm right or wrong? If I'm right how to achieve this. Or if I'm wrong please point mistake in my solution. This is my 1st time when I'm calculating median.
It's a little embrassing that no one even look at it - 16 views and probably all mine - well doesn't matter anymore because I figured it out myself.
For proper median calculation for all dimensions I should use Median function and Scope function in MDX. So here is the code if someone will face the same problem in future:
CREATE MEMBER CURRENTCUBE.[Measures].[Median]
AS Null
VISIBLE = 1;
SCOPE([Measures].[Median]);
THIS = MEDIAN([View Issue Median].[Issue ID].[Issue ID], [Measures].[Hours Resolved]);
END SCOPE;
Related
I require some more advanced MDX knowledge than mine.
I need to get the RepoRate_MAX for repo products, at book and instrument level, but also looking at the Java code I'm replacing that code always uses the max MurexId.
How can I perform the below (I've placed MAX in here on the dimension but this is wrong) and I need the combo of the dimensions and also the MAX MurexId:
[Measures].[RepoRate_VAL] = (([Deal].[ProductType].&[REPO],[Deal].[Book],[Deal].[Instrument],MAX([Deal].[MurexId])),[Measures].[RepoRate_MAX])
I'm sure it's a simple one but my mind is part way between the Java OO and MDX worlds currently haha :D
Thanks
Leigh
So after some experimenting I found out about the TAIL and Item MDX functions.
I think at one point I did get it working, but didn't make a note of what did work. I was playing around with this and variants of it..but most versions ended up in unusable query times:
[Measures].[RepoRate_VAL] = (([Deal].[ProductType].&[REPO],[Deal].[Book],[Deal].[Instrument],TAIL(EXISTING([Deal].[MurexId].[MurexId])).Item(0)),[Measures].[RepoRate_MAX])
So I then decided to push the RepoRate calculation back to the SQL data preparation script. Cleaner/smoother data is always better and then to have simple calculated members.
I used SQL to determine the RepoRate from tradelevel with MAX(MurexId) and GROUP BY on Book, Instrument to then update my main fact table to ensure that the correct RepoRate was set at Book, Instrument level.
Thus the calculated member is then:
[Measures].[RepoRate_VAL] = (([Deal].[Book],[Deal].[Instrument]),[Measures].[RepoRate_MAX])
Fast data prep and a fast calculated member on the Excel/Pivot/UI layer.
I've been picking this one up and putting it down for a few months now and have spent several hours on trying to figure out how to set up the right expression. I have a dataset that is dynamic based on the parameters chosen. for example AHT(Average handle time), Adherence and %of time in personal break.
So what I need it to do is if its AHT I need it to find the max value and divide that by the number of entries then display that in a HH:MM:SS format. If it's adherence I need it to do the same thing but display in Percentage format and same for personal breaks.
This is the expression I tried to build I've tried a few instances of it and not getting what I want as I usually just get #error.
=AVG(Fields!ACTUALVALUE.Value(IIF(Fields!KPINAME.Value = "AHT",
FORMAT(dateadd("s", Fields!KPINAME.Value, "00:00:00"), "hh:mm:ss"))
I know this is way too far off to work but for the life of me can not figure out how to do this any hints or points in the right direction will be greatly appreciated.
Below is a picture of how it spits out when I just do Max or AVG. AHT is showing in Seconds and Break and Total personal are just showing up as number.
For the IIF, the syntax is
=IIF(<CONDITION (i.e. x=1)>, < This if true>, < else this>)
Since the table is grouping by the KPI Name, the KPI Name should be outside of the aggregate then the different formats can be used for each KPI:
=IIF(Fields!KPINAME.Value = "AHT",
FORMAT(DATEADD("s", AVG(Fields!ACTUALVALUE.Value)), "00:00:00"),
FORMAT(DATEADD("s", AVG(Fields!ACTUALVALUE.Value)), "0.0%")
)
I'm having trouble getting the results I would like from the query I've built. The overall goal I'm trying to accomplish is to get the first odometer reading of the month and the last odometer reading of the month for a specific vehicle. I would then like to subtract the two to get total miles driven for that month. I figured a derived table with window functions would best help to accomplish this goal (see example SQL below).
SELECT
VEHICLE_ID2_FW
FROM
(SELECT
VEHICLE_ID2_FW,
LOCATION_CODE_FW,
MIN(ODOMETER_FW) OVER(PARTITION BY YEAR(DATE_FW), MONTH(DATE_FW)) AS MIN_ODO,
MAX(ODOMETER_FW) OVER(PARTITION BY YEAR(DATE_FW), MONTH(DATE_FW)) AS MAX_ODO
FROM
GPS_TRIPS_FW) AS G
I keep running into an issue where the derived table's query, by itself, runs and
works. However, when I bracket it in the FROM clause it shoots back an the error
The multi-part identifier could not be bound
Hoping that I could get some help figuring this out and maybe finding an overall better way to accomplish my goal. Thank you!
Odometers only increase (well, that should be true). So just use aggregation:
select VEHICLE_ID2_FW, year(date_fw), month(date_fw),
min(ODOMETER_FW), max(ODOMETER_FW),
max(ODOMETER_FW) - min(ODOMETER_FW) as miles_driven_in_month
from GPS_TRIPS_FW
group by VEHICLE_ID2_FW, year(date_fw), month(date_fw);
This answers the question that you asked. I don't think it solves your problem, though, because the total miles driven per month will not add up to the total miles driven. The issue are the miles driven between the last record at the end of the month and the first at the beginning of the next month.
If this is an issue, ask another question. Provide sample data, desired results, and an appropriate database tag.
I am currently working to integrate a third party mapping tool into my current system.
Problem is the tool itself as it replaces an existing system needs certain tweaks, as well as a summarized version of data to make SSRS reporting much faster.
Right now all I would like to do from a dataset perspective is return something similar to Sum(Numerator1) & First(Operator1) & Sum(Numerator2) & First(Operator2) & Sum(Numerator3) & First(Operator3) -- If Needed for another Numerator
The problem I have is my calculation can in theory be anything, so even storing it like this will be a huge pain.
so I'm passing balances into each one of those fields, Numerators being numbers and operators being (+,-,*,/). The reason I see this being my only option is I need Numerator's to be able to fluctuate between groups so if I'm grouping 5 rows vs 10 rows or a full total together I am still doing the same calculation my balances are just changing.
Problem is how can I make SSRS evaluate whatever I have to pass in here, and is it possible to do this as a string.
Division is the kicker here and the main reason I have to do this in the report as I might have data for 20 units. I need to provide the initial calculation for each unit as well as provide the calculation with each of the balances summed for all 20 units to figure say a percent of sales or something.
If I do this in the report I would have to have a total for each unit and then for the overall total. I don't want to do this because the report will have untold amount of additional sub totals and trying to bring it the final balance back in the query just will not work.
I appreciate any help or ideas anyone has for this.
Thank you,
Striker~
You can't evaluate a string as an expression in SSRS.
If you have the time and the know-how, then you could write a function in VB.net that parses the expression and returns the result.
You would then call that function from your report like so:
=Code.ParseString(Fields!MyStringExpression.Value)
Without telling us why your calculation could be anything, we can't provide much more information!
I have a SSAS cube in which there is a measure that needs to be allocated via a percentage located in another measure. I have all this set up as a Measure Expression in my "Equity Amount" measure and it works great.
My problem is that this "Equity Amount" measure is actually a snapshot so I would need it to aggregate using the LastChild function. It turns out that you cannot have a measure expression in a semi additive measure so i'm trying to fake the LastChild function in MDX.
I've seen a lot of examples everywhere on the web and all but none of them talk about having multiple hierarchies in the date dimension. I have both "calendar Year" and "Fiscal Year" hierarchies.
My MDX works for one hierarchy but as soon as I scope for the second hierarchy, the first one gets overwritten. I'm guessing I need to treat both hierarchies in a single statement but am having a real tough time getting it to work.
Here is my MDX for one hierarchy. Can anyone help modify it for multiple hierarchies or is there any other way to solve my problem ?
Scope([Measures].[Equity Value]);
This = iif(isleaf([Calendar].[By Calendar Year].CurrentMember),
[Measures].[Equity Value],
([Calendar].[By Calendar Year].CurrentMember.LastChild,[Measures].[Equity Value]));
End Scope;
David,
1) You're using scope as a calculated member. You can get rid of your iif by declaring the scope working only in a sub-cube :
scope ([Measures].[Equity Value],[Calendar].[By Calendar Year].levels(0).... )
This = (the expression)
2) Not sure to understand your problem but a tuple with two members of two hierarchies of the same dimension can be null by construction: As an example your first day of the calendar (1/1/2010) and the first day of your fiscal calendar (e.g. 1/6/2020) are not the same day so actually null. Two hierarchies of a same dimension are only ways of representing the same coordindates (here days), you're doing an intersection by declaring a tuple.
Not sure I'm helping you...
Thanks for trying! I understand what you mean (I think). MDX is one tough language!
I ended up doing the allocation via the view that is the source for my measure and keeping the LastChild aggregation function for the measure. In the end, it is much easier and also is better for query performance.
Thanks anyway :)