Forum Discussion
Helper IVCreate a table with dates based on Start / End Dates and Values on another Table
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 |
Perhaps:
Calendar Table = ADDCOLUMNS( CALENDAR(DATE(2020,1,1),DATE(2020,12,31)), "Period",MAXX(FILTER('Table',[Start Date]<=[Date] && [End Date]>=[Date]),[Period]) )
5 Replies
- Greg_Deckler
Community Champion
Perhaps:
Calendar Table = ADDCOLUMNS( CALENDAR(DATE(2020,1,1),DATE(2020,12,31)), "Period",MAXX(FILTER('Table',[Start Date]<=[Date] && [End Date]>=[Date]),[Period]) )
HennadiiGreg_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
The most important parts are:
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.
- amitchandak
Super User
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.
