Oracle: SELECT * FROM tablea a, tableb b WHERE a.fielda(+)=b.fieldb — what is (+)?
Question
I cannot understand what the role of the (+) is! (I "inherited" the statement through the automated update process of an application I am maintaining at the moment).
Is this some Oracle-specific operator? Does it have a special name that I can search for? It's kind of hard to google for a plus sign between brackets :)
1 answers
solution1
14 ACCPTED 2011-05-20 15:16:28
它是一个外连接运算符（old-school）。
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