In relational databases, the category of methods responsible for defining and managing the structure of the database, including creating, modifying, and deleting database objects, is called Data Definition Methods. These methods are essential for setting up the blueprint of the database and controlling its overall structure.
Data Definition Methods include commands like CREATE, ALTER, and DROP. Here's a brief explanation of these commands:
1. CREATE: This command is used to create new database objects such as tables, views, indexes, etc. It defines the structure of these objects by specifying the names of columns, data types, constraints, etc.
2. ALTER: The ALTER command is used to modify the structure of existing database objects. It can be used to add or remove columns, change data types, or add constraints to tables.
3. DROP: The DROP command is used to delete database objects like tables, views, or indexes. It removes the object and its data from the database.
By using Data Definition Methods, database administrators and developers can effectively design and manage the schema of the database, ensuring data integrity and efficient data storage.
