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。
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。
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。
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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