## Self Joins A **self join** is a regular join in which a table is joined with itself. It is extremely useful for querying hierarchical relationships stored inside a single table (such as an organizational chart or directory paths). Because you are joining the same table, you **must use table aliases** to differentiate the left instance from the right instance. Alice (ID: 1) Bob (Mgr: 1) <text

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What is a self join?

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Explain self joins. A self join is a regular join, but the table is joined with itself.

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