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Is there any difference between left join and left outer join??????

please clarify me..

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Accepted Solutions
LinusH
Tourmaline | Level 20

Well, the answer is No. From the paper:

"Often you will hear the "left outer join" referred to as just the "left join". This is because the code that creates the join uses only the keyword "left join". The terms, however, are synonymous. "

/Linus

Data never sleeps

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3 REPLIES 3
art297
Opal | Level 21

Yes.  A nice description, I think, is shown and described in the paper: http://www2.sas.com/proceedings/sugi30/249-30.pdf

It compares sql joins with data step merge operations, and shows the various merges and joins in terms of a venn diagram.

LinusH
Tourmaline | Level 20

Well, the answer is No. From the paper:

"Often you will hear the "left outer join" referred to as just the "left join". This is because the code that creates the join uses only the keyword "left join". The terms, however, are synonymous. "

/Linus

Data never sleeps
Howles
Quartz | Level 8

It's documented (http://support.sas.com/documentation/cdl/en/sqlproc/63043/HTML/default/viewer.htm#p1bk7i6jqseje7n1li...😞

"Outer joins are inner joins that have been augmented with rows that did not match with any row from the other table in the join.".

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