Forum Discussion
When we should create Date Table?
Hello guys,
In one of my PBIX, I have one Star Scheme that have only one DATE column, in this case, I´m using the parameter in PowerBI Desktop which creates one "virtual" date table for each Date column, this PowerBI GuyInACube video explains: https://www.youtube.com/watch?v=2f7dYB1l84g
In another PBIX, I have an Star Scheme but the main table have MULTIPLES date columns, in this case, should I create one DATE TABLE manually or can I continue using the parameter? Which one is better for performance?
Plus, there´s any explanation why Date and time should be saparated?
GuyInACube let´s check if you are online 😜
Best Regards,
Bruno
2 Replies
Hello HarishKM , thank you for your reply.
I have read this article but what I don´t understand is this:
"However, having a calendar table gives two big advantages:
- It allows you to aggregate data by non-standard columns (think your company’s financial year, or your timesheet weeks, or the Mayan calendar!).- It gives you access to all of the wonderful time-intelligence functions in DAX, with names like TOTALYTD and CLOSINGBALANCE. Without a calendar table these won’t work."
This is not actually true, since the video that I´ve shared explains that PowerBI do this by itself with the parameter of time intelligence marked as true.
