Document that join is by default right outer join #709

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mattdowle opened this Issue Jun 25, 2014 · 1 comment

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mattdowle commented Jun 25, 2014

Suggestion from @tucson :

I propose to update datatable-intro.pdf with a chapter [4. Join], and a Table of Content in the same doc. [4. Join] could explain that "data.table join is done as follows: [example]. DATA.TABLE JOIN IS A RIGHT OUTER JOIN BY DEFAULT. [4.1 Right outer join (default option)] [4.2 Left outer join] [4.3 Inner join] [4.4 Full outer join] Each paragraph giving a simple example.

Made as a comment here :
http://stackoverflow.com/questions/12773822/why-does-xy-join-of-data-tables-not-allow-a-full-outer-join-or-a-left-join/12778902#comment36326349_12778902

@mattdowle mattdowle added this to the v1.9.4 milestone Jun 25, 2014

@mattdowle mattdowle modified the milestones: v1.9.6, v1.9.4 Sep 27, 2014

@mattdowle mattdowle modified the milestones: v1.9.8, v1.9.6 Oct 24, 2014

@arunsrinivasan arunsrinivasan self-assigned this Mar 11, 2016

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arunsrinivasan commented Mar 12, 2016

Done in ?data.table. Will reflect in vignette after, as this'll change to inner join soon enough.

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