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Using Join

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  1. What is joining a table to itself called?
    1. CROSS
    2. OBSOLETE
    3. COMPLETE
    4. SELF
    5. None of these
Correct Option: D

Joining a table to itself in a database is called ‘self-join’. When a self-join is being performed, the table is being used multiple times within the query and a table name qualifier is unnecessary.


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