Create a table with dates based on Start / End Dates and Values on another Table

[Hennadii]

Hi there,

I have a Period table with Star Date and End Date columns. Periods are not overlap each other, so each date is related to certain Period.

Period	Start Date	End Date
period 1	01/01/2020	01/03/2020
period 2	01/07/2020	01/08/2020

I'd like to create a new table (like a Calendar or Date), with a columns Date and Period.

Please help me to write expression which creates the table as below.

Date	Period
01/01/2020	period 1
01/02/2020	period 1
01/03/2020	period 1
01/07/2020	period 2
01/08/2020	period 2

[amitchandak]

@Hennadii ,

Try

Create a date table
Date = calendar(Min(Period[Start Date]),Max(Period[End Date]))

Add a new column in that

Period = minx(filter(period, Period[Start Date]<=Date[Date] && Period[End Date]>=Date[Date]),Period[Period])

[Hennadii]

Thank you @amitchandak  and @Greg_Deckler  !!!

@amitchandak, your detailed sample helped me to understand Greg's solution which I like more as it gives a table from one expression.

[Greg_Deckler · Accepted solution]

Perhaps:

Calendar Table = 
  ADDCOLUMNS(
    CALENDAR(DATE(2020,1,1),DATE(2020,12,31)),
    "Period",MAXX(FILTER('Table',[Start Date]<=[Date] && [End Date]>=[Date]),[Period])
  )

@Hennadii 

[Hennadii]

@Greg_Deckler ,
Is there a way to do not hardcode dates in expression?

[Greg_Deckler]

Sure, if you have dates in your data, you can use MIN and MAX or use CALENDARAUTO but not sure what your data looks like. If you have posted the sum total of your data, you will need to parse out the beginning and ending dates of your periods.

Please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

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1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.