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Hi there,
I want to import multiple csv files in a folder. In the below example, I have 3 csv files in the folder.
How can I import only 2 of the 3 files based on the date in the file name as 2 separate tables ?
Here is what I want:
- table 1: the file with the Max date. So it will the be file, "data_20240619", and rename the table name as "data_current"
- table 2: the date = 1 day prior to the Max date. So it will be the file, "data_20240618", and rename the table name as "data_prior_day"
- reason: my team will continue to save the most recent data file into the same folder, so as new file arrive, I need Power Bi to grab the latest data file and the file -1 day.
Thank you so much for your help!
Thanks, @MaxShema .
Sorry, I am brand new to Power BI, so need a bit hand holding. Appreciate it!
in the step #1 Create a new Query and name it as "data_current"
step #2 Add as a source for this query your folder with the csv files
in step #3 Extract the dates from the names to the separate column
Hi
You can try to do the next way.
Use the next script in M:
= Table.AddColumn(Source, "Date", each
let
// Extract the date part of the string
DatePart = Text.Middle([Name], 5, 8),
YearPart = Text.Start(DatePart, 4),
MonthPart = Text.Middle(DatePart, 4, 2),
DayPart = Text.End(DatePart, 2),
DateText = MonthPart & "/" & DayPart & "/" & YearPart
in
DateText)
4. Change type of column Date to date 🙂
5. Create a list that will contain the maximum value from the Date column.
6. And the last – Filter that row that has value in the Date column equal to MaxDate
Then add separate query “data_prior_day” and do the same but add another one step after calculation a maximum date – calculation the date before maximum.
As result you will get two queries with the one table in each: the table with max date in the name in the query "data_current" and the table with date one day before the max date in “data_prior_day”.
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
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