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KHorseman Super Contributor
Super Contributor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

@faacq one of the columns in a relationship must have unique values. A month name column will have the same month name appear at least 28 times. Date tables are normally linked to fact tables via the unique date column. All other columns are supplemental info about the date in question, not meant for creating relationships.


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faacq Frequent Visitor
Frequent Visitor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

Thank you for the reply. I probably do not undestand the purpose of having a date table. I was expecting after establishing the link between my fact table and the date table, to use the slicers to filter my data in many different ways.

If establishing the relation is not needed, how can I use the date table to slice my data?

 

KHorseman Super Contributor
Super Contributor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

@faacq you understand the purpose correctly, but not the method. You're trying to create a relationship with a month column, which is incorrect. You're supposed to create a relationship between a date column in your fact table and the main date column in the date table. Then you could use the month column as a slicer.


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faacq Frequent Visitor
Frequent Visitor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

You are right, using the date column I managed to establish the relation. When I try to slice my data It seems that the date table does not have any effect. My fact table has a column with "Month Year" info, but still I'm not able to slice my data with the columns available in the date table.

 

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mbdtz Regular Visitor
Regular Visitor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

@faacq I think your problem will be solved if you just turn the date column in your data to a date, eg. if it is 201601 just change it to 1/1/2016

 

In terms of using it in the slicer, make sure you pull the date column from the date table into the slicer, not the date column from the data

 

let me know if that helps 🙂

faacq Frequent Visitor
Frequent Visitor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

It worked, I established the relation between the date column in date.dim table and the date column in my fact table. I modified the content on the date column in my fact table from "Month" "year" to 01.01.2016.  I update the data type in PowerBI to (MMM yyyy)

Thank you for your help

Rsanjuan Member
Member

Re: Possible Tip/Trick: Dynamic Date Dimension Table

Hi,

 

Now that I have this date table, I am having trouble actually using it.  How can I calculate a rolling calculation, so that it will count the number of an event 60 days from today's date?  Also, how to count the number of events in the future?

 

 

Super User
Super User

Re: Possible Tip/Trick: Dynamic Date Dimension Table

Nice trick!

Just came across this blogpost using ADDCOLUMN allowing you to "script" the table-creation, so no need to create every single column manually: http://kohera.be/blog/business-intelligence/how-to-create-a-date-table-in-power-bi-in-2-simple-steps...

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Imke Feldmann

How to integrate M-code into your solution -- Check out more PBI- learning resources here -- Performance Tipps for M-queries




mbdtz Regular Visitor
Regular Visitor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

@ImkeF thanks so much! awesome 😄

amysmith Regular Visitor
Regular Visitor

Re: Possible Tip/Trick: Dynamic Date Dimension Table

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