Multiple choice technology databases

We refer to a join as a self-join when…

  1. We are using left and right join together

  2. We are joining more than 2 tables

  3. We are joining table to itself

  4. we are joining 2 tables
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

To solve this question, the user needs to know the concept of self-join in database management systems.

A self-join is a regular join, but the table is being joined with itself. This means that we are using a single table to compare rows within the same table.

Option A is incorrect because a left and right join is not referred to as a self-join.

Option B is incorrect because the number of tables being joined does not determine whether a self-join is being used or not.

Option D is incorrect because a regular join between two tables is not referred to as a self-join.

Therefore, the correct answer is:

The Answer is: C. We are joining table to itself.

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