SQLSERVER备份数据库的时候copy only选项的意思 仅复制备份 WITH copy_only 进行备份通常都会更改数据库，而这又会影响其他备份和还原这些备份的方式。不过，有时为了特殊目的， 必须执行不影响数据库的整体备份和还原过程的备份。 完整备份 一般用作在其之
SQLSERVER备份数据库的时候copy only选项的意思
仅复制备份 WITH copy_only
进行备份通常都会更改数据库，而这又会影响其他备份和还原这些备份的方式。不过，服务器空间，有时为了特殊目的，
必须执行不影响数据库的整体备份和还原过程的备份。
完整备份一般用作在其之后执行的一次或多次差异备份的基准备份。SQL2005支持创建仅复制备份，香港服务器，这并不影响正常的备份序列。
所以，与其他备份不同，仅复制备份不会影响数据库的整体备份和还原过程
可以为任何类型的备份创建仅复制备份
（1）仅复制完整备份（所有恢复模式）
若要创建仅复制完整备份或差异备份，请在backup database语句中使用copy only选项。
使用copy only选项执行的数据备份不能用作基准备份，并且不影响任何现有差异备份与定期完整备份或差异备份相反，网站空间，
仅复制备份不会截断事务日志
（2）仅复制差异备份
这些备份与通常的差异备份相同
注意：copy_only备份在备份集表的is_copy_only列中记录。仅复制备份只能通过使用backup语句来创建。
SSMS不支持仅复制备份即GUI备份不支持copy only选项
使用下面SQL语句来看到SQLSERVER自从安装以来执行过的数据库备份操作
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