我有完全备份，差异备份，和日志备份三种备份
代码分别是：
完全： backup database mydb to disk=’E:\Backup\mydb.bak’
差异：backup database mydb to disk=’E:\Backup\mydb.bak' WITH DIFFERENTIAL,INIT
日志：backup log mydb_log to disk=’E:\backup\mydb.trn’
请问与之对应的三种恢复语句分别怎么写？
另外完全备份时我想把在这之前的数据库日志删掉(不是删备份)，要是不删日志就会越来越长，请问怎么截断日志？
------解决方案--------------------
- SQL code
RESTORE DATABASE [mydb ] FROM DISK = N'E:\Backup\mydb.bak' WITH FILE = 1, NORECOVERY, NOUNLOAD, STATS = 10GORESTORE DATABASE [mydb ] FROM DISK = N'E:\Backup\mydb.bak' WITH FILE = 2, NORECOVERY, NOUNLOAD, STATS = 10GORESTORE LOG [mydb ] FROM DISK = N'E:\Backup\mydb.trn' WITH FILE = 3, NOUNLOAD, STATS = 10GO
------解决方案--------------------
- SQL code
SQL还原 ====================================================================== 1、验证备份 ------------------------ restore headeronly from bak3 restore filelistonly from bak3 with file=1 restore labelonly from bak3 restore verifyonly from bak3 ---------------------------------- 2、从备份中还原 ------------------------------------- restore headeronly from bak1 restore database d1 from bak1 with file=2 --从完全备份中恢复 ---------------------------------- restore headeronly from bak2 --从差异备份中恢复 restore database d2 from bak2 with file=1,norecovery restore database d2 from bak2 with file=5,recovery ---------------------------------- restore headeronly from bak3 --从日志备份中恢复 restore database d3 from bak3 with file=1,norecovery restore log d3 from bak3 with file=2,norecovery restore log d3 from bak3 with file=3,norecovery restore log d3 from bak3 with file=4,norecovery restore log d3 from bak3 with file=5,recovery ---------------------------------- restore database d3 from bak3 with file=1,norecovery --恢复到指定时间 restore log d3 from bak3 with file=2,norecovery restore log d3 from bak3 with file=3,norecovery restore log d3 from bak3 with file=4,recovery,stopat='2003-08-15 11:29:00.000' ---------------------------------- restore database d5 filegroup='FG2' from bak5 with file=4,norecovery --还原文件组备份 restore log d5 from bak5 with file=5,norecovery restore log d5 from bak5 with file=7,recovery ---------------------------------- restore headeronly from bak6 --还原文件备份 restore database d5 file='d5_data3' from bak6 with file=6,norecovery restore log d5 from bak6 with file=7,norecovery restore log d5 from bak6 with file=9,recovery ---------------------------------- restore database d5 from bak6 with replace --删除现有数据库，从备份中重建数据库 ---------------------------------- create database d6 --move to将数据库文件移动到新位置 on primary (name=d6_data, filename='E:\Program Files\Microsoft SQL Server\MSSQL\data\d6_Data.MDF', size=2MB) log on (name=d6_log, filename='E:\Program Files\Microsoft SQL Server\MSSQL\data\d6_log.ldf', size=2MB) go backupdatabase d6 to bak6 with init drop database d6 restore database d6 from bak6 with move 'd6_data' to 'e:\data\d6\d6_data.mdf', move 'd6_log'to 'e:\data\d6\d6_log.ldf' sp_helpdb d6 ---------------------------------- 3、分离与重连接数据库 -------------------------------------- sp_detach_db 'd6' sp_attach_db 'd6','e:\data\d6\d6_data.mdf','e:\data\d6\d6_log.ldf' -------------------------------------- sp_detach_db d6 go create database d6 on primary (filename='e:\data\d6\d6_data.mdf') for attach go ---------------------------------- 4、恢复损坏的系统数据库 ---------------------------------- 1）先备份MASTER、MSDB 2）停止SQL服务，将MASTER数据库文件删除或者重命名。这样，SQL服务将不能启动。 3）系统数据库的还原 ----------------------------------------------- （1）如果SQL服务还能启动，则从备份中恢复系统数据库。 （2）如果SQL服务不能启动，则需要重建系统数据库。 使用SQL文件夹TOOLS\BINN目录下的Rebuildm.exe重建master数据库。 （3）创建备份设备，指向以前的备份设备。 （4）以单用户模式启动SQL cd programe files\microsoft sql server\mssql\binn sqlservr.exe -c -m （5）进查询分析器，从备份中恢复master数据库。 restore database master from masterbak restore database msdb from disk='e:\bak\msdb.bak' MASTER还原后，SQL中用户数据库的信息也会恢复。 （6）如果MASTER没有备份，则需要用sp_attach_db命令将用户数据库附加到新的MASTER数据库中。