May 2020
Beginner
564 pages
14h 9m
English
Content preview from Learn SQL Database Programming
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Understanding results returned with a right outer join
A right outer join includes all rows from the right table and any matching rows between the right and left tables. The Venn diagram depicted in the following screenshot shows in gray the rows that would be returned with two tables:
If there are no rows in Table A that match Table B, only rows from Table B will be returned. Rows returned from Table B that don't have any matching rows in Table A will show null values for the columns in Table A.
Additionally, you can do a right excluding join. This would include all rows from the right table that don't match records in the left table, as ...
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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.