Which of the following statements about index is true? It is a data structure
a
that reduces the speed of data retrieval operations on a database table.
b
used to quickly locate data without searching every row in a table every time a database table is accessed.
c
created using only two rows of a database table to uniquely identify each record.
d
that allows relational database to split and store data in different tables, while linking disparate items.
Explanation
Correct Option
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