Truncate Dimensions/fact
May 17, 2007
Hi,
I am relatively new to SSIS/SSAS. I have searched the forums but cannot find an answer to my question.
I created a cube in SSAS and have deployed it. Now I am trying to use SSIS to populate the cube. I have setup a DS that points to the SSAS instance - it uses OLEDB Provider for Analysis services 9.0.
When I try to use a data flow task OLE DB source to truncate the dimension/cubes I do not see the DS in the list to select?
I am finding it hard to get into the SSIS way of organizing the processing.
Any Ideas?
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Jan 17, 2005
I am building a health care application that marries transaction-level data (health care services provided) with person-level characteristics that have a time-dimension. The person-level characteristics are diseases that the person has (these disease all have a start and some have an end date). The diseases are stored in a table in which the foreign keys are a person-identifier, a time identifier (month/year) and a surrogate for the disease. Persons can have more than one disease at a time (the diseases are NOT mutually-exclusive). There are no measures in this table. The transaction table has a foreign key for person and time (month/day/year), a procedure code (the type of service rendered) and money (the cost of the services).
How do I answer the following questions:
What is the total cost of care (the sum of all service costs) last year for persons with "disease A"?
What is the total cost of care last year for persons with "disease A" AND "disease B"?
What is the total cost of care last year for persons with "disease A" OR "disease B"?
I've tried a factless fact table but can't get it to work. If anyone has the right solution and can communicate to me before I slit my wrists, I would be greatly appreciative!!!
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May 22, 2008
Hi,
I have 2 fact tables and 2 dimensions (one of them is time).
fact1 ---- pk-fk ------ fact1-details-table
(date) |
| Dimension.
|
TimeDim
Is there a way to define measure group on fact1-details-table using TimeDim. Date info is only in fact1 table and not in details table.
Is namedquery joining the 2 fact tables the best solution in this case? There is so much redundancy using one fact table, so underlying sqldb uses 2 tables.
Thanks,
Chandra.
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Jul 10, 2007
Hello Everybody,
Can anybody please let me know the procedure for loading data into Dimensions & Facts? And what is the sequence of loading?
Thanks in Advance
Rajesh
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May 30, 2007
What are the general guildlines for choosing these settings, like paralle vs. sequential, different error configurations? The default selection for processing multiple dimensions is paralle and use default error configuration. But the default for processing multiple partitions is sequential. I cannot find anything helpful other than the definitions from the online help. TIA.
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Jul 15, 2015
I am modelling two fact tables of Actuals and Budget which are at different granularity, Actuals are at day, customer and product sub category level. Budgets are at month, Region and Product category level.
Month, Region and Product Category is present in Date, Region and Product Category dimension respectively. I have only three dimensions as Customer, Product and Date. Linking those dimensions to Actual Fact table is not an issue, what is the best way and options are there to link budget fact table to those three dimensions.
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Jul 6, 2015
I built my first tabular model and see that my fact tables are also appearing as dimensions. In Multi dimensional mode i could choose which are the dimensions. How do i do that in tabular model.
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Aug 16, 2007
Hi,
I use lookups to map surrogate of level 1 dimensions to my fact tables in SSIS.
But how to handle a level 2 dimension with a ValidFrom and a ValidUntil date field?
I do not use an IsCurrent column, because this could problem with late arriving facts.
- In dts I used an SQL statement like this:
update SA
SET SA.DimProdRef = Dim.RecordID
FROM SAWarenEingang SA, DimProd Dim
where SA.ProduktNumber = Dim.ProduktNumber
and SA.ArtikelkontoBewegungsdatum between Dim.ValidFrom and Dim.ValidUntil
Now in SSIS I want to handle the whole thing in the data flow without using a staging table:
- Using Lookups: I would have to pass the date column for each inside the fact table into the lookup. That does not work.
- Using Execute SQL in the data flow: would be very slow, because the statement will be executed for any line in the dataflow
Any ideas?
Best regards,
Stefoon
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Oct 26, 2015
Say you have a fact table with a few columns that all reference the same key column in a dimension table, you want to write a view to return the information for those keys?
USE MyTestDB;
GO
SET NOCOUNT ON;
IF OBJECT_ID ('dbo.FactTemp' ,'U') IS NOT NULL
DROP TABLE dbo.FactTemp;
[Code] ....
I'm using very small data at the moment, and the query plan and statistics don't really say which way.
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Dec 30, 2004
With a database size of almost 2 GB, I run the 'truncate table eventlog command' which completes successfully, but the database size only decreases by about 10 MB so stays too large - indeed the number of rows in the eventlog table is minimal, but the otehr tables in this database don't show such an amount of tables large enough to cause the size issue either. What could be the reason and how can I reduce it (possibly truncating another table but then which one, how could I determine which is too large and needs truncating?).
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Apr 17, 2008
Hi all...
Please forgive the elementary nature of my question, but could someone please explain the differences between these two database backup types:
1. Log backup
2. Log backup no truncate
From what I understand and have read, the "no truncate" backup method keeps the entire transaction log indefinitely. Using the truncation method, the transaction log is either 1) compressed or 2) cleaned up so that any completed transactions are removed from the log. Which one of these is true?
And, for the big question: is it better to run a backup of the transaction log with truncation or not? Our current backup scheme is similar to the following:
Full backup every 24 hours
transaction log backup every hour with no truncation
Should we insert a truncation backup somewhere in here? What is the danger of removing (or compressing) parts of the transaction log? Will this affect the restore process?
Thanks in advance!
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Oct 23, 2002
In Analysis Services is there a way you can change a private dimension into a shared dimension without having to recreate it
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Dec 5, 2004
Hi,
I need to change the name of some of my Dimensions and in some cases also need to change the name of the levels used in some dimensions....
Is there an easy way to do this or would I have to create my cubes from scratch?
which I really want to avoid :(
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Dec 5, 2004
Hi,
I need to change the name of some of my Dimensions and in some cases also need to change the name of the levels used in some dimensions....
Is there an easy way to do this or would I have to create my cubes from scratch?
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Mar 25, 2004
Hi,
I have noticed the the cubes that we have here use shared dimensions.
For almost all cubes(5-6) there are at least 4-5 common dimensions.
According to what I have been preached so far, the shared dimensions are so that you can reuse them. That is not what is practised here.
for example.
cube1 has somedim1, dim2_c1, dim3_c1...
cube2 has xyzdim1_c2,xyzdim2_c2,dim3_c2..
dim3_c1 and dim3_c2 are the same dimensions, one for each cube.
I don't know if I am missing something. Shouldn't the use the same dimensions? Could there be any reason for this.
pls. advice.
TIA
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Jan 29, 2007
I am new to SSIS and I am investigating using the Slowly Changing Dimension transform.
The data source that I receive is a daily snapshot of the external source system table. I need to store the history of the entity attributes (Type 2 SCD) and I am using the Start / End Date mechanism.
When an entity (identified by the business key) is no longer received in the source snapshot, I would like the data flow to update the End Date of the current row to show that the entity has now expired.
Does anyone have any suggestions for a good way to achieve this ?
NB: Changing the source system extract to include and flag expired entities is not an option for me.
Many thanks
Graham
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Mar 8, 2006
Hello,
This is my first task in attempting to populate a fact and dimension table from SSIS.
I have a Fact table Sales and dimension tables Customer and Location. The data I am getting to fill this structure is in one file. where each record contains the sales information as well the customer information and location details on the same row.
I am using the SSIS to fill this structure by using the slowly changing dimension for the Customer dimension.
I am filling the customer dimension by using the slowly changing dimension. If I have 2 records having same BusinessKey but each with a different first name, where first name is set as a changing attribute, it is creating the customer twice in the table. But shouldn't it create one record with the most recent first name? or am I miss using the SCD.
I have another conceptual question, I am not sure which is the best way to fill my fact and dimension. Should I fill the customer and location dimensions first through 2 different loops on the data and then fill the fact table and map to corresponding dimensions? Or should I do like a for each loop on each record and for each record fill the dimensions and fact simultanously?
Thanks in Advance,
Grace
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May 16, 2008
I have a question regarding a proble with two dimensions I built.
The first is named Account and contains approx 40k records. The second dimension is named Contact and contains the emps from the Account dim and contains approx 58k records. In the cube I also have two measures, One is a count of courses a Contact has taken. The second measure is a count of certifications a Contact may have earned.
The Account dim table has an AccountKey primary key and the Contact dim table has a ContactKey primary key and an AccountKey foreign key to the Account table. The key fields are not operational keys. They are surrogates. Both Contact and Account dim tables have as the first 10 or so records values that are used as parent groupings in the Cube dimension. For instance.
key = 1, name value = 'A-C'
Each proceeding value has the parent grouping's key value set as its parentkey.
The fact table contains both the AccountKeys and ContactKeys and an ItemId that corresponds to a specific course or certification. This itemid is used for the measures in the Cube
That's the background... here's my problem.
Using BIDS or Mgmt Studio, whenever I add the root dimAccount level (actual account names) as a row and then add the root Contact level (Contact names) as another row and drill down to a specifc Accounts contacts, everything locks up. I have only one measure in the data pane. The fact table only has about 20k records in it. I would think this should return data instantly. If I browse the cube with any other comination of dimensions besides the Contact and Account dimensions, the cube runs fine. It is just the combination of Account and Contact. I am getting really frustrated as I cannot figure this out.
I am rusty at SSAS so forgive me if I left out any pertinent info.
Thanks in advance for your help.
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Aug 13, 2004
I have a problem where I have 3 three measures in a virtual cube:
"Actual", "Budget" and "Full Year Budget".
The dimensions I have are:
- Account No_ / Name
- Cost Code
- Sub Cost Code
- Time/Dates
- Budget Name
Both "Actual" & "Budget" measures need to be filtered/dimensioned by:
- Account No_ / Name
- Cost Code
- Sub Cost Code
- Time/Dates (exclusive to "Actual", "Budget")
Thus have put these in one cube
AND "Full Year Budget" needs to be filtered/dimensioned by:
- Account No_ / Name
- Cost Code
- Sub Cost Code
- Budget Name (exclusive to "Full Year Budget")
THUS have put this as one cube…
I then created a virtual cube, with the 2 cubes thinking that the dimensions I created in the original cubes would only filter the measures of the original cube measures in the virtual cube. ...BUT all dimension filters in the virtual cube filter all measures in the virtual cube, irrespective of which dimensions were created with the original cubes.
please help!
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Jun 1, 2005
When I open my Cube the default dimension on Rows is the dimension name that is first on the alphabetic list and on the columns it defaults to the time dimension.
I need to specify a specific dimension to be shown on rows and columns when the cube is viewed.
The analysis server is 2000 with SP3.
Thanks in Advance for the assistance
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Oct 13, 2004
Hi All, any advice or help greatly appreciated, I need to Process Dimensions and Cubes Overnight, what is the best and most reliable way of achieving this.
Many Thanks in anticipation.
Shurl
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May 24, 2007
I am facing some problem in calculating Median
I am trying to calculate the median value using one of the measures and a dimension value.
Time is a measure in my cube and OpId is one of the dimensions.The result is as follows:
opid time median
1 55
2 23
3 23
Total 23
The Time here for Op Id 1 is the aggregation for all the rows whose OpId is 1.I want the median of the values whose OpId is 1 which is not showing at the moment.
What I am getting here is the median for all of the OpId but what I really want is the median for each of the individual Opid's as well.
I am using a calculated field Median with the following expression.
MEDIAN
( [Dim Operation].[Dim Operation].currentmember.children ,[Measures].[Elapsed Time])
Thanks
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Jun 13, 2015
I'm new to MDX, and most of the time I customize existing queries rather than writing new ones. I currently have a MDX query like this
SELECTÂ
[Measures].[Fees Billed]
         on 0,
except([Age].[Day Buckets].members, {[Age].[Day Buckets].[All], [Age].[Day Buckets].&[Unknown]})
 on 1
FROMÂ
   MyCube
WHERE ([Fiscal Period].[Fiscal Year].&[2015], [Customer].[City].&[Auckland] )
Which brings the fees billed by age buckets where the customer's city is Auckland. I also have another dimension called [Sales Agent] with a member [City] in it, and there is a member in [Customer] called [Customer].[Sales Agent]
I am trying to retrieve the same information where the customer's sales agent's city is Auckland rather than the customer's city.
If it is SQL, I will join Customer and SalesAgent on Customer.SalesAgentUno = SalesAgent.SalesAgentUno and bring in the desired data. Any way in MDX to do this?
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May 19, 2008
I have a fact table with a create time dimension and an expiration time dimension. I'd like to have a calculated member that would compare the (count for create time) / (count with that expiration time). I already have these counts as measures.
I would be able to put the create time dimension in the "row fields" area, and see the ratio (calculated above)
over the different create time periods.
Can someone point me in the right direction on how I would create that kind of calculated member? What would the MDX look like?
Thanks for your help
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Jan 25, 2008
Hi, All experts here,
Thank you for your kind attention.
I have questions about Slowly Changing Dimensions. I am quite confused about when should we use type 1 ( changing), type2 (historical), or type3( fixed) for the dimensions in each table? Is there any good suggestions on that?
Thank you in advance and I am looking forward to hearing from you.
Yours sincerely,
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Feb 21, 2007
I need to create a package that updates the dimensions and cube data from a data warehouse on daily basis. I was going to create a Data Flow that takes the data from the DW source then put it as input to a Process Dimension destination to update the dimensions and use a Process Partition destination in the same manner to update the cube, but then I came across the Analysis Services Processing Task which seems to do the job as well. I am kinda confused which way to go. Any recommendations?
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Aug 14, 2007
Hi,
I created a report model based over the cube. The problme is, it retrieves all dimensions from the cube regardless those are checked or not even in the prespective.
It does work with Measure but not with Dimensions.
Appreciate if some one can drop a line here and help me out.
Thank you
Imran
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Jun 25, 2015
I need to show the dimensions of my model like columns in the result. I have this query
withÂ
member [Measures].[Customer] as [Customers].[Customer].CURRENTMEMBER.Name
member [Measures].[UCs] as [UCs].[UC].CURRENTMEMBER.Name
member [Measures].[Order Type] as [Order Types].[Order Type].CURRENTMEMBER.Name
member [Measures].[UC Dates] as [UC Dates].[UC Date].CURRENTMEMBER.Name
[Code] .....
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Jun 21, 2005
I have an archive of an Analysis Services database that was created on a server that is not accessible to me. I also have a copy of the source SQL Server database that it uses as a data source. I have restored both of these to my server. I have figured out how to change the data source to point to my server for the fact tables referenced, but I can't figure out how change the data source for the shared dimensions. I would like to be able to do work on this version of the database, but I get errors when I try to browse the dimension data because it can't connect to the original data source. Any ideas?
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May 4, 2015
Actually I want to do distinct sum on a measure group, please find the below table as sample
XL Measure group
LKÂ Â Â Â OKÂ Â Â Â Â Amount
1Â Â Â Â Â Â Â 10Â Â Â Â Â Â Â Â 100
1Â Â Â Â Â Â Â Â 11Â Â Â Â Â Â Â Â 100
3Â Â Â Â Â Â Â Â Â 30Â Â Â Â Â Â Â 250
3Â Â Â Â Â Â Â Â Â 31Â Â Â Â Â Â Â 250
3Â Â Â Â Â Â Â Â Â 32Â Â Â Â Â Â Â 250
For the above measure group two dimensions have relationships, One is L dimension which is having relationship with XL on LK and One is O dimension which is having relationship with XL on OK. If I drag L dimension attributes  it should show results as below
LK LName Amount
1Â Â Â Â AÂ Â Â Â Â Â Â Â 100
3Â Â Â Â CÂ Â Â Â Â Â Â Â Â 250
But above results are coming as below
LK LName Amount
1Â Â Â Â AÂ Â Â Â Â Â Â Â 200
3Â Â Â Â CÂ Â Â Â Â Â Â Â Â 750
If I drag O dimension attributes along with L dimension, it should show results as below.
LK  LName  OK     OKName  Amount
1Â Â Â Â Â Â Â Â AÂ Â Â Â Â Â Â Â 10Â Â Â Â Â Â XYZÂ Â Â Â Â Â Â Â 100
1Â Â Â Â Â Â Â Â AÂ Â Â Â Â Â Â Â 11Â Â Â Â Â Â UVWÂ Â Â Â Â Â Â 100
3Â Â Â Â Â Â Â Â CÂ Â Â Â Â Â Â Â 30Â Â Â Â Â Â PQRÂ Â Â Â Â Â Â Â Â 250
3Â Â Â Â Â Â Â Â CÂ Â Â Â Â Â Â Â Â 31Â Â Â Â Â KLMÂ Â Â Â Â Â Â Â 250
3Â Â Â Â Â Â Â Â CÂ Â Â Â Â Â Â Â Â 32Â Â Â Â Â TUVÂ Â Â Â Â Â Â Â 250
I used formula Measures.Amount/Measures.Count, this formula is not showing correct results when I don't drag any dimensions, it is showing results for All member as 425, but it should show as 350.
So I made a same change ([L].[LK].Currentmember, Measures.Amount)/([L].[LK].Currentmember,Measures.Count), this worked fine but performance is very low and so stopped working on this.
Atlast I did the measure group like this
LK    OK     LAmount  OAmount
1Â Â Â Â Â Â Â 10Â Â Â Â Â Â Â Â 100Â Â Â Â Â Â Â 100
1Â Â Â Â Â Â Â Â 11Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â 100
3Â Â Â Â Â Â Â Â Â 30Â Â Â Â Â Â Â 300Â Â Â Â Â Â Â 300
3Â Â Â Â Â Â Â Â Â 31Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â Â Â 300
I want to show Measures.LAmount when only L dimension is querying and want to show OAmount when both L dimension and O dimension are querying. Is this possible ?
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Jul 24, 2015
SSAS 2008 R2
Is it possible to filter out a measure only at the intersection of Two dimension members? I have a date dimension, Â a Hospital dimension and a wait time measure.
For Example, is it possible to filter out Wait time for Bayside Hospital for the Month of June 2015?
I want Wait time to continue to be displayed for all other months and roll up into the totals without the filtered value.
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Aug 4, 2015
I have make a calculated member for previous period of an given date range. The previous period is the same date range from the previous year, and I have managed to achieve that with the calculated member:
Create member currentcube.[Measures].[PrevPeriod] as
(ParallelPeriod( [Start Date].[Cal Hierarchy].[Year], 1, [Start Date].[CAL Hierarchy].CurrentMember), [Measures].[Count]);
This member returns the correct result as long as my query uses the time dimension, which makes sense... but I also need to show results sliced by other dimensions in bar charts that do not display the time dimension. For example, I have a dimension with only 3 members called [Region].[Area].[AreaName].
The result set for the bar chart needs to look like this:
[AreaName]Â | [Count]Â |Â [PrevPeriod]
East           |   43     |      56
West          |   53     |      95
But the [PrevPeriod] only returns values if I include the time dimension. I essentially need to sum the results of the time dimension/AreaName/[PrevPeriod] tuple down to just Areaname/[PrevPeriod] for whatever date range may be involved.
I don't know if this is significant to the issue, but the client tool that generates the bar charts builds the query with the date range as a subcube in the FROM statement. If the [PrevPeriod] is outside of the subcube that is still OK, as long as the time dimension is included in an Axis on the final select statement, so at least I know I am not suffering from the members inside the subcube. I've also found in SSMS that it makes no difference if I make the query a subcube, or put the date range in a where clause instead; I still get NULL for [PrevPeriod] without the dates.
I can't imagine that this is an unusual situation, so I hope I've explained it adequately! What is the recommended technique for summarizing a Parallelperiod by dimensions without displaying the time/dates ?
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Sep 22, 2015
I have a cube with 2 many-to-many dimensions where a special mdx query needs about 5 seconds. When I resolve the many to many relationships by multiplying the data in the fact table the query needs 21 seconds.
In general do many-to-many dimensions slow down query performance of a cube?
Without the many-to-many dimensions of course the fact table has much more rows. Could this be the reason for the performance loss?
how to tweak query performance of a cube in general?
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