What does (+) do in Oracle SQL?

Question

I\'m using Oracle SQL Developer to query an Oracle DB (not sure which version it is) and I\'m going to use the SQL I make for a Crystal report. Many of the reports the prev

Answer 1

It is not recommended. See this previous answer

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

Answer 2

That represents a “right outer join” (right because the = is on the right side of the +).

SELECT *
FROM TableA, TableB
WHERE TableA.PrimaryKey(+) = TableB.ForeignKey

is equivalent to

SELECT *
FROM TableA
RIGHT OUTER JOIN TableB
  ON (TableA.PrimaryKey = TableB.ForeignKey)

Answer 3

(+) is used to perform right outer join in Oracle RIGHT OUTER JOIN is one of the JOIN operations that allow you to specify a JOIN clause For details http://docs.oracle.com/javadb/10.8.3.0/ref/rrefsqlj57522.html

Answer 4

right outer join