Correct option is D
DDL (Data Definition Language) is a subset of SQL used to define, create, and delete database objects such as tables, views, and indexes. It includes commands like CREATE, DROP, and ALTER.
Important Key Points:
1.
CREATE: Defines new database structures like tables and views.
2.
DROP: Deletes objects such as tables and views permanently.
3.
ALTER: Modifies the structure of an existing table.
Knowledge Booster:
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Data Mining: Refers to extracting patterns from data, unrelated to SQL commands.
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Data Audit: Ensures the integrity and quality of data.
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Referential Integrity: Ensures consistency in relationships between tables but is not part of DDL.