# Data Definition (DDL)

- [Datatypes](/sql/data-definition-ddl/datatypes-and-fixed-encoding.md): Datatypes and Fixed Encoding
- [Users and Databases](/sql/data-definition-ddl/users-and-databases.md)
- [Tables](/sql/data-definition-ddl/tables.md)
- [System Tables](/sql/data-definition-ddl/system-tables.md)
- [Views](/sql/data-definition-ddl/views.md): DDL - Views
- [Policies](/sql/data-definition-ddl/policies.md)
- [Comment](/sql/data-definition-ddl/comment.md)