Computer Science for IGCSE & O level - Databases (Section 4 - No. 13)
Which of the following statements is true about indexes in database?
Indexes are useful for writing to a database.
Indexes speed up data retrieval.
Indexes slows down data retrieval.
Indexes are not useful for querying the database.
Εξήγηση
Indexes are used for the effective fetching of data.