15 Questions
Which type of index determines the physical order of data rows in a table?
Clustered index
What is the purpose of an index in a database?
To speed up data retrieval
What is the term used to refer to the columns on which an index is created?
Indexed columns
Which type of index can enforce the uniqueness of values in the indexed columns?
Unique index
What are the trade-offs of using indexes in a database?
Increased storage space and slower data modification operations
Which type of index provides a separate structure to map data in a table?
Non-clustered index
What is a primary key in a database?
A type of unique index
Which type of index is typically created on one or more columns of a table?
B-tree index
What is the purpose of a unique index in a database?
To enforce uniqueness of values
What determines the choice of index type in a database?
The specific requirements and characteristics of the data and queries
True or false: Indexes are used to speed up the retrieval of data from a table.
True
True or false: An index key is created on one or more columns of a table.
True
True or false: Indexes consume storage space and can slow down insert, update, and delete operations.
True
True or false: Non-clustered indexes determine the physical order of data rows in a table.
False
True or false: A primary key is a special type of unique index that enforces the uniqueness and non-null constraint on a table's primary key column(s).
True
Learn how to improve query performance by utilizing indexes effectively. Understand the concept of index keys and how they enhance the search process in a database.
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