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In SQL DDL commands are used to create and modify the structure
of a database and database objects.
These commands are CREATE, DROP, ALTER, TRUNCATE, and RENAME
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Data Definition Language (DDL) is a subset of SQL.
Its primary function is to create, modify, and delete database structures but not data.
The commands in DDL are: CREATE, DROP, ALTER, TRUNCATE and RENAME
Remember: In DDL operations, COMMIT and ROLLBACK statement cannot be performed
because the MySQL engine automatically commits the changes.