Scalar Subquery

A subquery required to return one column and no more than one row.

What is Scalar Subquery in a relational database?

Scalar Subquery — A subquery required to return one column and no more than one row.

SELECT order_id
FROM purchase_order
WHERE total_amount > (
    SELECT AVG(total_amount)
    FROM purchase_order
);

Level: Apprentice · More Database terms at this level

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