创建作业自动清理并收缩数据库日志

USE [msdb]
GO


/****** Object:  Job [clear_database_log]    Script Date: 05/31/2018 11:26:28 ******/
BEGIN TRANSACTION
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
/****** Object:  JobCategory [[Uncategorized (Local)]]]    Script Date: 05/31/2018 11:26:28 ******/
IF NOT EXISTS (SELECT name FROM msdb.dbo.syscategories WHERE name=N'[Uncategorized (Local)]' AND category_class=1)
BEGIN
EXEC @ReturnCode = msdb.dbo.sp_add_category @class=N'JOB', @type=N'LOCAL', @name=N'[Uncategorized (Local)]'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback


END


DECLARE @jobId BINARY(16)
EXEC @ReturnCode =  msdb.dbo.sp_add_job @job_name=N'clear_database_log', 
@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'[Uncategorized (Local)]', 
@owner_login_name=N'sa', @job_id = @jobId OUTPUT
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
/****** Object:  Step [clear_database_log]    Script Date: 05/31/2018 11:26:28 ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'clear_database_log', 
@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'ALTER DATABASE database SET RECOVERY SIMPLE WITH NO_WAIT
GO
ALTER DATABASE database SET RECOVERY SIMPLE  
GO
USE database
GO
DBCC SHRINKFILE (N''database_log'' , 11, TRUNCATEONLY)
GO
 
ALTER DATABASE database SET RECOVERY FULL WITH NO_WAIT
GO
ALTER DATABASE database SET RECOVERY FULL
GO', 
@database_name=N'database', 
@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'clear_database_log', 
@enabled=1, 
@freq_type=8, 
@freq_interval=1, 
@freq_subday_type=1, 
@freq_subday_interval=0, 
@freq_relative_interval=0, 
@freq_recurrence_factor=1, 
@active_start_date=20180531, 
@active_end_date=99991231, 
@active_start_time=50000, 
@active_end_time=235959, 
@schedule_uid=N'1be7d9ad-1851-419e-bbee-6b18ced7a271'
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:

GO

把其中的database替换成相对应的数据库（把上述内容拷贝到文本，进行批量替换），拷贝到SQL查询分析器中执行，执行完成后，会在作业中出现一个“clear_******_log”的作业，可以根据需要调整执行时间，默认每周执行一次。此作业已在SQL2008中测试通过！！！