Sql Server 笔记

1. 当 Sql Server 2008 R2 中的数据库日志文件比较大时，可以用以下脚本来清理日志

USE [master]
GO
ALTER DATABASE test_log4net SET RECOVERY SIMPLE WITH NO_WAIT
GO
ALTER DATABASE test_log4net SET RECOVERY SIMPLE
GO

USE test_log4net
GO
DBCC SHRINKFILE (N'test_log4net_log' , 1, TRUNCATEONLY)  --第二个参数:0=行、1=日志、2=FILESTREAM
GO

USE [master]
GO
ALTER DATABASE test_log4net SET RECOVERY FULL WITH NO_WAIT
GO
ALTER DATABASE test_log4net SET RECOVERY FULL
GO

任务计划脚本：

USE [msdb]
GO

/****** Object:  Job [定时清理数据库test_log4net的日志文件]    Script Date: 08/15/2018 14:29:29 ******/
BEGIN TRANSACTION
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
/****** Object:  JobCategory [[Uncategorized (Local)]]]    Script Date: 08/15/2018 14:29:29 ******/
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'定时清理数据库test_log4net的日志文件', 
        @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 [定时清理数据库test_log4net的日志文件]    Script Date: 08/15/2018 14:29:29 ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'定时清理数据库test_log4net的日志文件', 
        @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 test_log4net SET RECOVERY SIMPLE WITH NO_WAIT;
ALTER DATABASE test_log4net SET RECOVERY SIMPLE;
DBCC SHRINKFILE (N''test_log4net_log'' , 1, TRUNCATEONLY);
ALTER DATABASE test_log4net SET RECOVERY FULL WITH NO_WAIT;
ALTER DATABASE test_log4net SET RECOVERY FULL;', 
        @database_name=N'test_log4net', 
        @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'定时清理数据库test_log4net的日志文件', 
        @enabled=1, 
        @freq_type=4, 
        @freq_interval=1, 
        @freq_subday_type=1, 
        @freq_subday_interval=0, 
        @freq_relative_interval=0, 
        @freq_recurrence_factor=0, 
        @active_start_date=20180815, 
        @active_end_date=99991231, 
        @active_start_time=0, 
        @active_end_time=235959, 
        @schedule_uid=N'46bf6a3e-ea58-488f-84ab-0eac08dcaa0f'
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

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