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Equivalent Oracle syntax of SQL:1999 syntax

What is the equivalent Oracle syntax of the following SQL:1999 syntax?

What is the equivalent Oracle syntax of the following SQL:1999 syntax?
SELECT .....
FROM a JOIN b ON (a.docid = b.docid)
    LEFT OUTER JOIN (a.docid = c.docid) 
The above does not look like SQL-99 compliant syntax to me. It should be as follows:
SELECT ....
FROM a LEFT OUT JOIN b ON (a.docid = b.docid)
And Oracle supports this. In your example, you define the join condition twice. SQL-99 does not ask you to define the join condition more than once.

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