LEFT JOIN vs. LEFT OUTER JOIN in SQL Server

Question

What is the difference between LEFT JOIN and LEFT OUTER JOIN?

Answer 1

To answer your question

In Sql Server joins syntax OUTER is optional

It is mentioned in msdn article : https://msdn.microsoft.com/en-us/library/ms177634(v=sql.130).aspx

So following list shows join equivalent syntaxes with and without OUTER

LEFT OUTER JOIN => LEFT JOIN
RIGHT OUTER JOIN => RIGHT JOIN
FULL OUTER JOIN => FULL JOIN

Other equivalent syntaxes

INNER JOIN => JOIN
CROSS JOIN => ,

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