When creating a view, which SQL command is used to define the structure of the view?

When creating a view, which SQL command is used to define the structure of the view?

• A. CREATE VIEW
• B. INSERT VIEW
• C. SELECT VIEW
• D. ALTER VIEW

Answer: (A)

The command used to define the structure of a view in SQL is "CREATE VIEW." This command is essential for establishing a new view, which is essentially a virtual table based on the result of a SQL query. When you use CREATE VIEW, you specify the name of the view and the SELECT statement that determines which columns and rows will be included.

The CREATE VIEW command allows you to create a simplified or customized representation of data from one or more tables, enabling easier data retrieval and enhanced security by restricting access to specific columns or rows. It helps in abstracting complex queries and presents data in a manner that can be more digestible for users or applications.

Other options do not serve the purpose of creating a view: "INSERT VIEW" is not a valid SQL command and would imply adding a view which does not exist in SQL terminology; "SELECT VIEW" is not a recognized command either, as SELECT is used for querying data rather than defining structures; and "ALTER VIEW" is intended for modifying an existing view, not creating one from scratch.