• (5.3.10)数据库迁移——sql server降级操作


    sql server如果要把高版本数据 还原到低版本,需要一些方法和策略

    【0】需求2008R2降低到2005

    【1】使用生成脚本功能导出所有数据库对象及表数据(2008以上)

      

      

    【2】使用 生成脚本功能导出表结构+链接服务器插入数据

      (1)获取表结构脚本

        

       (2)构造链接服务器,生成插入脚本

    --要使用,@new_db内容用查找替换来全部替换掉,否则会有问题的
    
    declare @old_db varchar(100),@new_db varchar(100),@sql varchar(max)
    select @old_db='[10.1.4.234].db_tank',@new_db='test2'
    
    -- 获取有自增列插入语句
    select 'use '+@new_db+';set identity_insert '+t1.name+' on;insert into '+@new_db+'.dbo.'+t1.name+'('+
    (select stuff((select',['+name+']' from test2.sys.syscolumns where id=t1.object_id for xml path('')),1,1,''))+')'+
    ' select '+(select stuff((select',['+name+']' from test2.sys.syscolumns where id=t1.object_id for xml path('')),1,1,''))
    +' from '+@old_db+'.dbo.'+t1.name+';set identity_insert '+t1.name+' off;' 
    from test2.sys.tables t1 
    where exists 
    (
    select 1 from test2.sys.columns t2 where t2.is_identity=1 and t1.object_id=t2.object_id 
    ) 
    and t1.type='u'
    
    
    -- 获取无自增列插入语句 
    
    select 'use '+@new_db+';insert into '+@new_db+'.dbo.'+t1.name+' select * from '+@old_db+'.dbo.'+t1.name+';' 
    from test2.sys.tables t1 
    where not exists 
    (
    select 1 from test2.sys.columns t2 where t2.is_identity=1 and t1.object_id=t2.object_id 
    ) 
    and t1.type='u'
    
    --------------核验--------------------
    -- 更新统计信息
    use test2
    EXEC sys.sp_updatestats
    
    use db_logs
    EXEC sys.sp_updatestats
    -- 根据聚集索引/堆对比行数
    
    use master;
    if object_id('temp1') is not null
    drop table master.dbo.temp1
    
    select t2.name tab_name,rows,indid into master..temp1 
    from [10.1.4.234].db_tank.sys.sysindexes t1 join [10.1.4.234].db_tank.sys.sysobjects t2 on t1.id=t2.id 
    where t1.indid in(0,1) and t2.type!='S'
    
    use master;
    if object_id('temp2') is not null
    drop table master.dbo.temp2
    
    select t2.name tab_name,rows,indid into master..temp2 
    from test2.sys.sysindexes t1 join test2.sys.sysobjects t2 on t1.id=t2.id 
    where t1.indid in(0,1) and t2.type!='S'
    
     
    -- 根据聚集索引/堆对比行数,筛选行数不一致的
    select t1.*,t2.*,t1.rows-t2.rows as flag from 
    master..temp1 t1 join
    master..temp2 t2 on t1.tab_name=t2.tab_name
    where t1.rows-t2.rows>0
    -- 对比表存在情况
    select t1.*,t2.*,t1.rows-t2.rows as flag from 
    master..temp1 t1 full join
    master..temp2 t2 on t1.tab_name=t2.tab_name
    where t1.tab_name is null or t2.tab_name is null

    【3】BCP(不用考虑identity)

    简单思路就是

    (1)生成表结构脚本到低版本数据库

    (2)高版本BCP导出

    (3)低版本BCP导入

    参考:BCP导入导出

    --打开高级选项
    EXEC SP_CONFIGURE 'show advanced options', 1;
    RECONFIGURE;
    --启用执行CMD命令
    EXEC SP_CONFIGURE 'xp_cmdshell', 1;
    RECONFIGURE;
    
    --导出
    EXEC [master]..xp_cmdshell 'BCP db_tank..sys_users_detail out D:DataBackUpsys_users_detail.txt -c  -Uroadadmin -Ppo@#r53e%$k8(+-3 -S127.0.0.1,2433'
    GO
    
    select COUNT(1) from db_tank..sys_users_detail
    
    --导入
    use test2 
    go
    EXEC [master]..xp_cmdshell
    'BCP test2.dbo.sys_users_detail in D:DataBackUpsys_users_detail.txt -c -T -Uroadadmin -Ppo@#r53e%$k8(+-3 -S127.0.0.1,2433'
    GO

    【4】使用发布订阅

    这个百度发布订阅使用教程就是,这里不做演示了。

    【必看】

    不管用哪种方法,记得同步登录名,权限

    -- 登录名获取
    SELECT
    'CREATE LOGIN [' + p.name + '] ' + CASE WHEN p.type IN ( 'U', 'G' ) THEN 'FROM windows ' ELSE '' END + 'WITH ' + CASE WHEN p.type = 'S' THEN 'password = ' + master.sys.fn_varbintohexstr(l.password_hash) + ' hashed, ' + 'sid = ' + master.sys.fn_varbintohexstr(l.sid) + ', check_expiration = ' + CASE WHEN l.is_expiration_checked > 0 THEN 'ON, ' ELSE 'OFF, ' END + 'check_policy = ' + CASE WHEN l.is_policy_checked > 0 THEN 'ON, ' ELSE 'OFF, ' END + CASE WHEN l.credential_id > 0 THEN 'credential = ' + c.name + ', ' ELSE '' END ELSE '' END + 'default_database = ' + p.default_database_name + CASE WHEN LEN(p.default_language_name) > 0 THEN ', default_language = ' + p.default_language_name ELSE '' END FROM sys.server_principals p LEFT JOIN sys.sql_logins l ON p.principal_id = l.principal_id LEFT JOIN sys.credentials c ON l.credential_id = c.credential_id WHERE p.type IN ( 'S', 'U', 'G' ) --AND p.name NOT IN ( 'sa') AND p.name NOT LIKE '%##%' AND p.name NOT LIKE '%NT SERVICE%' AND p.name NOT LIKE '%NT AUTHORITY%'
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  • 原文地址:https://www.cnblogs.com/gered/p/12736961.html
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