March 2018
Beginner to intermediate
638 pages
16h 29m
English
Content preview from Mastering Microsoft Power BI
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Mark As Date Table
Most data warehouses store date columns as integers for query performance reasons. For example, an Order Date Key column on a fact table would store the 20180225 (YYYYMMDD) value as an integer data type to represent February 25th, 2018. Likewise, an existing date dimension table in the data warehouse usually also contains a YYYYMMDD date key column to support the join to these fact tables in SQL queries. If this date dimension table also contains a date column and meets essential data integrity criteria, the Mark as Date Table feature in Power BI Desktop can be used to leverage existing integer/whole number columns representing dates for relationships.
In the following screenshot, the Date table has been selected in the ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.