Tableau：我需要了解两个日期之间的天数差异。 Datediff提供的结果不正确，为什么？

Question

I am using DATEDIFF as

DATEDIFF('day', #2016-12-24#, #2016-12-22#)

I am getting the result as -1468. If I interchange the dates, I am getting 1468 While the difference is just 2 days.

If I use DATEDIFF('day', #2016-12-24#, TODAY()) I am getting 8808. why? Any help is greatly appreciated in getting the dates difference properly.

Answer 1

Weird problem with Tableau. Here is the solution. https://community.tableau.com/thread/122324

Tableau automatically uses SUM() when we drag this field into rows/columns. We need to use non-additive aggregation like MIN() MAX() AVG() or MEDIAN().

Thanks Shawn, for your answer in the Tableau Community.

Answer 2

DATEDIFF的格式功能：DATEDIFF（date_part，[开始时间]，[结束时间]。由于首先使用结束时间，随后使用开始时间，所以显示-1468。请确保开始时间和结束时间为字符串格式。