Which command is used to retrieve data from a database?

The command used to retrieve data from a database is the SELECT command. It allows users to specify exactly which data they wish to see from one or more tables in a database. The SELECT statement can be used to filter results, sort them, and even group them based on specific criteria. For example, you can retrieve all records from a table or only those that meet certain conditions.

Other commands listed, such as INSERT, UPDATE, and DELETE, serve different purposes. INSERT is used to add new records to a database, UPDATE modifies existing records, and DELETE removes records from a database. Each of these commands plays a critical role in data manipulation, but none are intended for retrieving data, which is the specific function of the SELECT command.