问题
I am trying to put a filter in Tableau which automatically shows data for last two days. I tried using Dense rank (which works in SQL) but in Tableau I can't figure out which aggregator function to use with it.
How can I put a filter to show latest two dates in Tableau?
回答1:
Filtering based upon the most recent dates is generally easily done by:
- Right click and dragging the date field to the filter shelf
- Select "Individual Dates"
- From the filter dialog, choose "Top" and "By field"
- Select "Top", 2 (for the most recent two dates)
- Select the date field and choose Maximum for aggregation.
This Tableau KB article also has a good write up of the technique: http://kb.tableau.com/articles/howto/filter-on-last-date-in-the-data-source
来源：https://stackoverflow.com/questions/30880457/how-to-put-a-filter-to-show-latest-two-dates-in-tableau