An operation that removes all rows in a table without causing any triggered action

An operation that removes all rows in a table without causing any triggered action.

In Oracle and MySQL(depending on the storage engine) the operation is not transactional and cannot be rolled back.

In PostgreSQL and SQL Server the statement must be committed or rolled back.

In SQL Server, TRUNCATE TABLE removes all rows from a table or specified partitions of a table, without logging the individual row deletions. TRUNCATE TABLE is similar to the DELETE statement with no WHERE clause; however, TRUNCATE TABLE is typically faster and uses fewer system and transaction log resources.

The ISO SQL Standard classifies TRUNCATE TABLE as data manipulation language (DML) but DBMS software vendors commonly classify it as DDL for their own implementation-specific purposes.

References:

TRUNCATE TABLE (Transact-SQL)

ISO/IEC 9075-2 14.10