利用SQL Server代理服務(wù)-定時(shí)清理SQL Server數(shù)據(jù)庫(kù)日志文件

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說(shuō)到清理SQL Server數(shù)據(jù)庫(kù)日志文件，這件事兒可大可小，有的客戶安裝的是簡(jiǎn)版的sql，再使用的時(shí)候最大2GB的日志文件+數(shù)據(jù)文件，超過(guò)了就不啟動(dòng)或者報(bào)錯(cuò)，甚至數(shù)據(jù)也不能寫入，很尷尬，完整版的，在沒(méi)設(shè)置無(wú)限大的時(shí)候，也就是4GB，其實(shí)這東西也占盤不是，沒(méi)啥用處，還得定時(shí)清理才是王道！

利用SQL Server代理服務(wù)-定時(shí)清理SQL Server數(shù)據(jù)庫(kù)日志文件

USE [msdb]
GO

/****** Object:? Job [ClearDBLog]??? Script Date: 2023/6/15 13:44:38 ******/
BEGIN TRANSACTION
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
/****** Object:? JobCategory [Database Maintenance]??? Script Date: 2023/6/15 13:44:38 ******/
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'ClearDBLog',
????????@enabled=1,
????????@notify_level_eventlog=2,
????????@notify_level_email=0,
????????@notify_level_netsend=0,
????????@notify_level_page=0,
????????@delete_level=0,
????????@description=N'無(wú)描述。',
????????@category_name=N'Database Maintenance',
????????@owner_login_name=N'sa', @job_id = @jobId OUTPUT
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
/****** Object:? Step [ClearDBLogStep1]??? Script Date: 2023/6/15 13:44:38 ******/
EXEC @ReturnCode = msdb.dbo.sp_add_jobstep @job_id=@jobId, @step_name=N'ClearDBLogStep1',
????????@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 [laoliang_net] SET RECOVERY SIMPLE WITH NO_WAIT?
GO
--設(shè)置數(shù)據(jù)庫(kù)恢復(fù)模式為簡(jiǎn)單
ALTER DATABASE [laoliang_net] SET RECOVERY SIMPLE;
GO
--收縮日志文件
DBCC SHRINKFILE (N''laoliang_net_log'', 11, TRUNCATEONLY);
GO
ALTER DATABASE [laoliang_net] SET RECOVERY FULL WITH NO_WAIT?
GO?
--恢復(fù)數(shù)據(jù)庫(kù)還原模式為完整
ALTER DATABASE [laoliang_net] SET RECOVERY FULL',
????????@database_name=N'laoliang_net',
????????@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'ClearDBLogPlan',
????????@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=20230615,
????????@active_end_date=99991231,
????????@active_start_time=0,
????????@active_end_time=235959,
????????@schedule_uid=N'bddeed70-2db4-4041-99d5-376dadc7870e'
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

其中，laoliang_net為數(shù)據(jù)庫(kù)文件名稱，laoliang_net_log為數(shù)據(jù)庫(kù)日志文件名稱。

具體在使用的時(shí)候，將數(shù)據(jù)庫(kù)文件名稱和數(shù)據(jù)庫(kù)日志文件名稱替換為自己數(shù)據(jù)庫(kù)的相關(guān)文件名稱，然后在數(shù)據(jù)庫(kù)查詢框中執(zhí)行以上代碼，就會(huì)生成SQL Server代理作業(yè)（數(shù)據(jù)庫(kù)需啟用SQL Server代理服務(wù)）。

右鍵點(diǎn)擊“屬性”，在彈出界面中選擇“計(jì)劃”

雙擊右側(cè)的計(jì)劃列表，可以設(shè)置作業(yè)運(yùn)行的頻率。

按照以上就可以按照規(guī)劃的時(shí)間來(lái)定時(shí)清理SQL日志文件啦！

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