ANSI left join & left join(+)

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Can anyone please help me to know the difference between ansi left join and left join with ((+)) syntax?Do they produce the same results when one is converted to other?And which one is the older one?

Posted 1-Apr-15 8:18am

ORACtrlC

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PIEBALDconsult 1-Apr-15 14:48pm

Yes.

Maciej Los 1-Apr-15 15:05pm

I like it!

Mohibur Rashid 2-Apr-15 4:10am

me like too

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Richard Deeming · Accepted Answer · 2015-04-01T08:50:00

Solution 1

Difference between Oracle's plus (+) notation and ansi JOIN notation?[^]

The + syntax is older, and is only included for backwards-compatibility. It also has some restrictions which the ANSI JOIN syntax doesn't have.

Oracle recommend[^] that you only use the ANSI syntax.

Posted 1-Apr-15 8:50am

Richard Deeming

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Maciej Los 1-Apr-15 15:04pm

+5!

Jörgen Andersson 1-Apr-15 16:51pm

Funnily enough, Oracle doesn't follow their own recommendations. :rolleyes:
Should also mention that the optimizer doesn't always produce the same plan for Ansi and Implicit joins. Have been hit quite badly by that in the past.