In database systems, an index provides a data structure that allows for faster data retrieval based on ____________ columns.
- Indexed
- Indexed and sorted
- Key
- Primary
In database systems, an index provides a data structure that allows for faster data retrieval based on key columns. Indexes are created on columns frequently used in queries to speed up data retrieval operations. By organizing data in a structured manner, indexes enable the database engine to quickly locate and access the desired information without having to scan the entire dataset.
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