Multiple choice technology databases

____________ is the outer join operator.

  1. (+)

  2. (-)

  3. (*)

  4. +
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A Correct answer
Explanation

In Oracle SQL, the (+) operator is used for outer joins in the WHERE clause syntax. For example, WHERE table1.column = table2.column(+) indicates a right outer join (rows from table2 are preserved). The (-) and * and + alone are not outer join operators.

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