September 2019
Beginner to intermediate
346 pages
7h 35m
English
Content preview from Hands-On SAS for Data Analysis
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Full join
The first thing to remember about a full join is that it is not a cross join or what we might call a default Cartesian product. A full join does not have a multiplier effect. It doesn’t match each record to every record in the connecting table. So what is a full join? A full join can be considered a combination of an inner join with a left join plus right join where the records are only represented once. As a SAS learner, try and ensure that you don't get confused by the concepts of a full and a cross join. The following diagram is a full join Venn diagram:
We will use the Coalesce function to ensure that we have no missing ClassID ...
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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.