Differential backup — Backs up all of the modified pages in a database after the last successful full backup is completed.
差异化备份——只对上次完全备份之后有过更改的页面进行备份。
Differential database backups are smaller and faster than full database backups.
与完全数据库备份相比，差异数据库备份体积更小，速度也更快。
A full database backup is required before a differential backup can be performed.
需要执行完整备份后，才能执行差异备份。
For large databases, differential backups can occur at shorter intervals than database backups, which reduces the work-loss exposure.
对于大型数据库，进行差异备份的间隔可以比数据库备份更短，从而可降低丢失工作的可能性。
For large databases, differential backups can occur at shorter intervals than database backups, which reduces the work-loss exposure.
对于大型数据库，进行差异备份的间隔可以比数据库备份更短，从而可降低丢失工作的可能性。
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