What type of query is used to update data fields in a database?

The correct answer is Update queries because they are specifically designed to modify existing records in a database. These queries allow users to change the values within specified fields of a table, making it possible to correct errors, update information based on new data, or adjust values according to business requirements.

When executing an update query, one can define which records to update by using criteria and specify the fields that need to be altered. This targeted approach helps maintain data integrity and ensures that only required changes are made to the database.

In contrast, select queries are used primarily to retrieve data from the database without making any alterations. Insert queries add new records to a table rather than modifying existing ones, while delete queries are employed to remove records from a table. Each query type has its own specific purpose, making the Update query the correct choice for changing data fields.