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What type of join is needed when you wish to return rows that do have matching values?

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What type of join is needed when you wish to return rows that do have matching values?

(a) Equi-join

(b) Natural join

(c) Outer join

(d) All of the Mentioned

The question was asked in a job interview.

I need to ask this question from Joins in section Laying the Foundation of SQL Server

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Best answer
The correct answer is (d) All of the Mentioned

To explain I would say: Outer join returns the row having matching as well as non matching values.

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