A clustered index is a type of database index that sorts and stores the data rows of a table based on the values of one or more columns. This index determines the physical order of data in the table, meaning that there can be only one clustered index per table, as the data can only be sorted in one way. Clustered indexes significantly enhance data retrieval speeds, especially for range queries, by allowing direct access to data without needing to look up rows in a separate structure.
congrats on reading the definition of clustered index. now let's actually learn it.