这两个操作的另一个区别是，如果表包含一个标识列，则在TRUNCATE下该列的计数器将重置1(或为该列定义的种子值)。DELETE没有这种影响。

在SQL Server 2005中，我相信你可以回滚截断

一眨眼的功夫就不能做DDL。

并不是说截断不记录SQL Server中的任何内容。truncate不记录任何信息，但它记录您触发truncate的表的数据页的释放。

如果在开始时定义事务，则可以回滚被截断的记录，回滚后可以恢复被截断的记录。但不能在提交截断事务后从事务日志备份中恢复截断记录。

DELETE The DELETE command is used to remove rows from a table. A WHERE clause can be used to only remove some rows. If no WHERE condition is specified, all rows will be removed. After performing a DELETE operation you need to COMMIT or ROLLBACK the transaction to make the change permanent or to undo it. Note that this operation will cause all DELETE triggers on the table to fire. TRUNCATE TRUNCATE removes all rows from a table. The operation cannot be rolled back and no triggers will be fired. As such, TRUCATE is faster and doesn't use as much undo space as a DELETE. DROP The DROP command removes a table from the database. All the tables' rows, indexes and privileges will also be removed. No DML triggers will be fired. The operation cannot be rolled back. DROP and TRUNCATE are DDL commands, whereas DELETE is a DML command. Therefore DELETE operations can be rolled back (undone), while DROP and TRUNCATE operations cannot be rolled back.

来自:http://www.orafaq.com/faq/difference_between_truncate_delete_and_drop_commands

都是很好的答案，我必须补充一句:

由于TRUNCATE TABLE是一个DDL(数据定义语言)命令，而不是DML(数据操作语言)命令，删除触发器不会运行。