What is the role of DDL commands when working with a database?

DDL (Data Definition Language) is a subset of SQL commands used to define and modify the structure of a database. The main role of DDL commands is to create, modify, and delete database objects such as tables, indexes, schemas, etc.

Examples of DDL commands:

• CREATE — creating tables, databases, and other objects.
• ALTER — modifying the structure of existing objects (e.g., adding a column to a table).
• DROP — deleting objects from the database.

Thus, DDL manages the database schema, not the data inside it.