Multiple choice technology databases

____________ is used to join a table to itself.

  1. SelfJoin

  2. EquiJoin

  3. OuterJoin

  4. InnerJoin
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A Correct answer
Explanation

A self-join is a regular join in which a table is joined with itself, which is useful for querying hierarchical data or comparing rows within the same table. Other joins like EquiJoin, OuterJoin, and InnerJoin describe the matching condition or inclusion of unmatched rows, but do not inherently mean joining a table to itself.

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