A(n)index can be used to quickly determine whether a value already exists in a specific column._________________________

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An index serves as a lookup for finding specific rows in a database table quickly. It also helps to enforce uniqueness, ensuring that no two rows have the same values in the indexed column(s). This makes it easier and faster to determine whether a value already exists in a specific column.

A(n)index can Be Used to Quickly Determine Whether a Value