利用SQL Server代理自动备份数据库

DECLARE @bakName varchar(500)

SET @bakName = 'E:\数据库备份\Lab_'
    + REPLACE(REPLACE(REPLACE(REPLACE(CONVERT(varchar(50), GETDATE(), 21),'-',''),':',''),'.',''),' ','') + '.bak'

BACKUP DATABASE [Lab] TO
DISK = @bakName 
WITH NOFORMAT, NOINIT,
NAME = N'Lab-完整 数据库 备份',
SKIP,NOREWIND,NOUNLOAD,STATS = 10

GO

　　在SQL Server中新建查询，输入以下SQL语句，即可以在“SQL Server代理”中新建作业，用于自动备份数据库：

USE [msdb]
GO
/****** 对象:  Job [数据库Lab备份]    脚本日期: 02/20/2011 21:35:28 ******/
BEGIN TRANSACTION
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
/****** 对象:  JobCategory [Database Maintenance]    脚本日期: 02/20/2011 21:35:28 ******/
IF NOT EXISTS (SELECT name FROM msdb.dbo.syscategories WHERE name=N'Database Maintenance' AND category_class=1)
BEGIN
EXEC @ReturnCode = msdb.dbo.sp_add_category @class=N'JOB', @type=N'LOCAL', @name=N'Database Maintenance'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

END

DECLARE @jobId BINARY(16)
EXEC @ReturnCode =  msdb.dbo.sp_add_job @job_name=N'数据库Lab备份', 
        @enabled=1, 
        @notify_level_eventlog=0, 
        @notify_level_email=0, 
        @notify_level_netsend=0, 
        @notify_level_page=0, 
        @delete_level=0, 
        @description=N'无描述。', 
        @category_name=N'Database Maintenance', 
        @owner_login_name=N'WEBSERVER\Administrator', @job_id = @jobId OUTPUT
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
/****** 对象:  Step [备份Lab数据库]    脚本日期: 02/20/2011 21:35:28 ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'备份Lab数据库', 
        @step_id=1, 
        @cmdexec_success_code=0, 
        @on_success_action=1, 
        @on_success_step_id=0, 
        @on_fail_action=2, 
        @on_fail_step_id=0, 
        @retry_attempts=0, 
        @retry_interval=0, 
        @os_run_priority=0, @subsystem=N'TSQL', 
        @command=N'DECLARE @bakName varchar(500)

SET @bakName = ''E:\数据库备份\Lab_''
    + REPLACE(REPLACE(REPLACE(REPLACE(CONVERT(varchar(50), GETDATE(), 21),''-'',''''),'':'',''''),''.'',''''),'' '','''') + ''.bak''

BACKUP DATABASE [Lab] TO
DISK = @bakName 
WITH NOFORMAT, NOINIT,
NAME = N''Lab-完整 数据库 备份'',
SKIP,NOREWIND,NOUNLOAD,STATS = 10

GO', 
        @database_name=N'master', 
        @flags=0
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_update_job @job_id = @jobId, @start_step_id = 1
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id=@jobId, @name=N'数据库Lab备份', 
        @enabled=1, 
        @freq_type=4, 
        @freq_interval=1, 
        @freq_subday_type=8, 
        @freq_subday_interval=4, 
        @freq_relative_interval=0, 
        @freq_recurrence_factor=0, 
        @active_start_date=20110220, 
        @active_end_date=99991231, 
        @active_start_time=0, 
        @active_end_time=235959
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXEC @ReturnCode = msdb.dbo.sp_add_jobserver @job_id = @jobId, @server_name = N'(local)'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
COMMIT TRANSACTION
GOTO EndSave
QuitWithRollback:
    IF (@@TRANCOUNT > 0) ROLLBACK TRANSACTION
EndSave: