A database administrator needs to speed up query times for a large table that is frequently searched. Which of the following database features is specifically designed for this purpose?
Primary key
Full table scan
Indexing
Data persistence
The correct answer is Indexing. A database index is a data structure used to improve the speed of data retrieval operations on a table. It works similarly to an index in a book, allowing the database to find specific data without scanning the entire table.
Full table scan is the process of reading every row in a table to find the requested data, which is generally slow and inefficient for large tables.Primary key's main purpose is to uniquely identify each record in a table, ensuring data integrity. While primary keys are typically indexed to make them fast to look up, the key itself is a constraint for uniqueness, whereas the index is the feature for speed.Data persistence ensures that data is stored permanently on non-volatile storage and is not lost when the application or system shuts down. This relates to data durability, not retrieval speed.Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
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