A database is ___ to reduce the number of disk accesses needed to process queries in order to improve performance.
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A copy of the ___ of the table is in the first column of the database, i.e., search key.
It is known as primary indexing if the index is created based on the table's primary key.
Since primary keys are sorted, ___ operations are quite efficient because of their sorted order.
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63 videos|8 docs|165 tests
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