How do i create default date set on a calendar in Tableau

Question

I am using a query in Tableau:

select * from mytable where Date(sometimestamp) between

start_date and end_date

As we change the date range, we can see that the date varies.

I want to set start_date as default current_date -90 and end_date as current_date  

Answer 1

In the data, the source date filter selects relative dates.

In relative dates  Months, Last 3 or select days and enter 90 under the "Last" radio button and click ok.

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