Why is OUTER optional in SQL Server? [closed]

StackOverflow https://stackoverflow.com/questions/16520367

  •  21-04-2022
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Question

Referring to this post on Stack Overflow

Why was the key word OUTER made optional (in LEFT OUTER JOIN etc) - if it had been a required word then scripts written on SQL Server would be more standard compliant?

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Solution

It is optional in ANSI SQL, not just in T-SQL.
And it is optional, because the joins are unambiguous without the use of OUTER.

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