日志压缩----备份、分离、删除日志、附加文件代码,MSSQL代码库,德仔网

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【MSSQL】日志压缩----备份、分离、删除日志、附加文件
作者:Dezai.CN / 发布于2011/12/28/ 748
<div><span style="font-size: 8pt; background-color: rgb(238, 238, 221); font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; line-height: 19px; ">*--调用示例</span></div>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">exec p_compdb 'FERMS_Iran'
--*/
use master --注意：该存储过程要建在master数据库中
go
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_compdb]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[p_compdb]
GO</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">create proc p_compdb
@dbname sysname, --要压缩的数据库名
@bkdatabase bit=1, --在分离日志的步骤中,可能会损坏数据库,可以选择是否自动备份数据库
@bkfname nvarchar(260)='' --备份的文件名,如果不指定,自动备份到默认备份目录,备份文件名为:数据库名+日期时间
as</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">--1.清空日志
exec('DUMP TRANSACTION ['+@dbname+'] WITH NO_LOG')</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">--2.截断事务日志：
exec('BACKUP LOG ['+@dbname+'] WITH NO_LOG')</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">--3.收缩数据库文件(如果不压缩,数据库的文件不会减小
exec('DBCC SHRINKDATABASE(['+@dbname+'])')</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">--4.设置自动收缩
exec('EXEC sp_dboption '''+@dbname+''',''autoshrink'',''TRUE''')</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">----后面的步骤有一定危险,请确保做好了数据库备份再选择下列的步骤
--5.分离数据库
if @bkdatabase=1
begin
if isnull(@bkfname,'')=''
set @bkfname=@dbname+'_'+convert(varchar,getdate(),112)+replace(convert(varchar,getdate(),108),':','')+'.bak'
select 提示信息='备份数据库到SQL 默认备份目录,备份文件名:'+@bkfname
exec('backup database ['+@dbname+'] to disk='''+@bkfname+'''')
end</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">--进行分离处理
create table #t(fname nvarchar(260),type int)
exec('insert into #t select filename,type=status&0x40 from ['+@dbname+']..sysfiles')
exec('sp_detach_db '''+@dbname+'''')</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">--删除日志文件
declare @fname nvarchar(260),@s varchar(8000)
declare tb cursor local for select fname from #t where type=64
open tb
fetch next from tb into @fname
while @@fetch_status=0
begin
set @s='del "'+rtrim(@fname)+'"'
exec master..xp_cmdshell @s,no_output
fetch next from tb into @fname
end
close tb
deallocate tb</span>
<p style="font-size: 13px; line-height: 19px; margin-top: 5px; margin-right: auto; margin-bottom: 5px; margin-left: auto; font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 221); "><span style="font-size: 8pt; ">--附加数据库
set @s=''
declare tb cursor local for select fname from #t where type=0
open tb
fetch next from tb into @fname
while @@fetch_status=0
begin
set @s=@s+','''+rtrim(@fname)+''''
fetch next from tb into @fname
end
close tb
deallocate tb
exec('sp_attach_single_file_db '''+@dbname+''''+@s)
go</span>
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