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COMPUTER • DATABASE
SQL COMMANDSLanguage Subsets DDLSchemaCREATE•ALTER•DROP•TRUNC DMLDataSELECT•INSERT•UPDATE•DELETE DCLSecurityGRANT•REVOKE•DENY TCLACIDCOMMIT•ROLLBACK•SAVEPT DDL modifies Schema; DML manipulates Data; DCL sets Grants

DDL COMMANDS DEFINE AND MODIFY DATABASE SCHEMA STRUCTURES

Data Definition Language statements like CREATE, ALTER, DROP, and TRUNCATE manage structural objects without directly altering user data records.