Full Form of DDL
DDL stands for Data Definition Language. It is a subset of SQL (Structured Query Language) used for defining and managing all structures in a database.
Key Features of DDL:
Database Schema Creation: DDL allows users to create and modify the structure of database objects such as tables, indexes, and views.
Commands: Common DDL commands include:
- CREATE: Used to create new tables or databases.
- ALTER: Used to modify existing database structures.
- DROP: Used to delete tables or other database objects.
- TRUNCATE: Used to remove all records from a table without deleting the table itself.
Importance of DDL:
- Database Structure Management: DDL is crucial for managing the architecture of a database.
- Integrity and Performance: Proper use of DDL commands ensures data integrity and enhances database performance.
- Foundation for DML: DDL sets the stage for Data Manipulation Language (DML), which is used for querying and updating data.
Understanding DDL is essential for anyone working with databases, as it lays the groundwork for effective data management and manipulation.