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Answers and rating deltas for

Why NVL() doesn't work in the following outer join(+)?

Author Votes Δ
user2672165 5 +4.52
Gordon Linoff 4 +0.50
Pavel Gatnar 2 -0.42
Patrick Marchand 0 -4.36
Last visited: Sep 10, 2016, 8:27:09 AM