把SQLServer数据库从高版本降级到低版本

时间：2014-02-16 19:58:09 阅读：559 评论：0 收藏：0 [点我收藏+]

方法一：使用图形化操作（GUI），打开SSMS(SQL Server Management Studio)

步骤1：右键你要降级的数据库，按下图选择：

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步骤2：在对话框中选择：

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步骤3：在【高级】中选择下图：

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步骤4：把脚本保存起来，然后在SQLServer2005中运行脚本。

详细步骤可以看：http://bbs.csdn.net/topics/390438560?page=1#post-394316973 中的13楼的回复，有截图

步骤5：通过【任务】→【导入数据】，把数据从2008导入到使用脚本创建的库上如下图，就完成了：

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方法二：使用系统自带的存储过程实现：sp_dbcmptlevel ——将某些数据库行为设置为与指定的 SQL Server 版本兼容

下面是其内部实现代码：

[sql] view plain copy print ?

SET QUOTED_IDENTIFIER ON
SET ANSI_NULLS ON
GO
create procedure sys.sp_dbcmptlevel -- 1997/04/15
@dbname sysname = NULL, -- database name to change
@new_cmptlevel tinyint = NULL OUTPUT -- the new compatibility level to change to
as
set nocount on
declare @exec_stmt nvarchar(max)
declare @returncode int
declare @comptlevel float(8)
declare @dbid int -- dbid of the database
declare @dbsid varbinary(85) -- id of the owner of the database
declare @orig_cmptlevel tinyint -- original compatibility level
declare @input_cmptlevel tinyint -- compatibility level passed in by user
,@cmptlvl80 tinyint -- compatibility to SQL Server Version 8.0
,@cmptlvl90 tinyint -- compatibility to SQL Server Version 9.0
,@cmptlvl100 tinyint -- compatibility to SQL Server Version 10.0
select @cmptlvl80 = 80,
@cmptlvl90 = 90,
@cmptlvl100 = 100
-- SP MUST BE CALLED AT ADHOC LEVEL --
if (@@nestlevel > 1)
begin
raiserror(15432,-1,-1,‘sys.sp_dbcmptlevel‘)
return (1)
end
-- If no @dbname given, just list the valid compatibility level values.
if @dbname is null
begin
raiserror (15048, -1, -1, @cmptlvl80, @cmptlvl90, @cmptlvl100)
return (0)
end
-- Verify the database name and get info
select @dbid = dbid, @dbsid = sid ,@orig_cmptlevel = cmptlevel
from master.dbo.sysdatabases
where name = @dbname
-- If @dbname not found, say so and list the databases.
if @dbid is null
begin
raiserror(15010,-1,-1,@dbname)
print ‘ ‘
select name as ‘Available databases:‘
from master.dbo.sysdatabases
return (1)
end
-- Now save the input compatibility level and initialize the return clevel
-- to be the current clevel
select @input_cmptlevel = @new_cmptlevel
select @new_cmptlevel = @orig_cmptlevel
-- If no clevel was supplied, display and output current level.
if @input_cmptlevel is null
begin
raiserror(15054, -1, -1, @orig_cmptlevel)
return(0)
end
-- If invalid clevel given, print usage and return error code
-- ‘usage: sp_dbcmptlevel [dbname [, compatibilitylevel]]‘
if @input_cmptlevel not in (@cmptlvl80, @cmptlvl90, @cmptlvl100)
begin
raiserror(15416, -1, -1)
print ‘ ‘
raiserror (15048, -1, -1, @cmptlvl80, @cmptlvl90, @cmptlvl100)
return (1)
end
-- Only the SA or the dbo of @dbname can execute the update part
-- of this procedure sys.so check.
if (not (is_srvrolemember(‘sysadmin‘) = 1)) and suser_sid() <> @dbsid
-- ALSO ALLOW db_owner ONLY IF DB REQUESTED IS CURRENT DB
and (@dbid <> db_id() or is_member(‘db_owner‘) <> 1)
begin
raiserror(15418,-1,-1)
return (1)
end
-- If we‘re in a transaction, disallow this since it might make recovery impossible.
set implicit_transactions off
if @@trancount > 0
begin
raiserror(15002,-1,-1,‘sys.sp_dbcmptlevel‘)
return (1)
end
set @exec_stmt = ‘ALTER DATABASE ‘ + quotename(@dbname, ‘[‘) + ‘ SET COMPATIBILITY_LEVEL = ‘ + cast(@input_cmptlevel as nvarchar(128))
-- Note: database @dbname may not exist anymore
exec(@exec_stmt)
select @new_cmptlevel = @input_cmptlevel
return (0) -- sp_dbcmptlevel
GO