What does DDL stand for in SQL?

• A. Data Definition Language
• B. Data Description Language
• C. Data Distribution Language
• D. Data Deployment Language

Answer: (A)

DDL stands for Data Definition Language, which is a subset of SQL used to define and manage the structure of a database. This includes operations such as creating, altering, and deleting tables and other database objects. The functions of DDL are fundamental to establishing the schema of a database, which dictates how data can be stored, modified, and organized.

Operations typically associated with DDL include the use of commands like CREATE, ALTER, and DROP. For instance, when you want to create a new table to store user information, you would use a CREATE TABLE command. Similarly, if you need to change the structure of an existing table by adding a new column, you would use ALTER TABLE.

The other terms provided in the options do not accurately represent the purpose or function of DDL in SQL. Data Description Language and Data Distribution Language, for instance, are not recognized subsets of SQL. Data Deployment Language, while it suggests some form of data management, does not correspond to any established terminology within SQL. Hence, Data Definition Language is the correct and widely accepted term that covers the functions related to defining and managing database structures.