----------------------------------------------------------------------------------
-- Author : htl258(Tony)
-- Date : 2011-05-17 17:25:07
-- Version: Microsoft SQL Server 2008 (RTM) - 10.0.1600.22 (Intel X86)
-- Jul 9 2008 14:43:34
-- Copyright (c) 1988-2008 Microsoft Corporation
-- Developer Edition on Windows NT 5.1 <X86> (Build 2600: Service Pack 2)
-- Blog : http://blog.csdn.net/htl258
----------------------------------------------------------------------------------
---以下脚本未进行大规模测试，操作前请先备份数据库，以便出问题时还原。有问题请留言,Ths。
--1.生成主键约束脚本并引出
SELECT 'ALTER TABLE '
+ QUOTENAME(a.TABLE_NAME)
+ ' ADD CONSTRAINT '
+ a.CONSTRAINT_NAME
+ ' PRIMARY KEY ('
+ QUOTENAME(COLUMN_NAME)
+');' AS [Parmary Key SQL]
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE a
JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS b
ON a.CONSTRAINT_NAME=b.CONSTRAINT_NAME
WHERE CONSTRAINT_TYPE='PRIMARY KEY'
--2.生成外键约束脚本并引出
SELECT 'ALTER TABLE '
+ QUOTENAME(OBJECT_NAME(a.PARENT_OBJECT_ID)) --表名
+ ' ADD CONSTRAINT '
+ OBJECT_NAME(a.OBJECT_ID) --约束名
+ ' FOREIGN KEY ('
+ QUOTENAME(c.name) --字段名
+ ') REFERENCES '
+ QUOTENAME(OBJECT_NAME(a.REFERENCED_OBJECT_ID))--被引用表名
+ ' ('
+ QUOTENAME(d.name)--被引用字段名
+ ')'
+ CASE WHEN a.delete_referential_action=1
THEN ' ON DELETE CASCADE '
ELSE ''
END
+ CASE WHEN update_referential_action=1
THEN ' ON UPDATE CASCADE '
ELSE ''
END
+';' AS [Foreing Key SQL]
FROM sys.foreign_keys a
JOIN sys.foreign_key_columns b
ON a.[object_id]=b.constraint_object_id
JOIN sys.[columns] c
ON b.parent_object_id=c.[object_id]
AND b.parent_column_id=c.column_id
join sys.[columns] d
ON b.referenced_object_id=d.[object_id]
AND b.referenced_column_id=d.column_id
--3.删除外键约束
SET NOCOUNT ON
DECLARE c1 cursor for
select 'alter table ['+ object_name(parent_obj) + '] drop constraint ['+name+']; '
from sysobjects
where xtype = 'F'
open c1
declare @c1 varchar(8000)
fetch next from c1 into @c1
while(@@fetch_status=0)
begin
exec(@c1)
fetch next from c1 into @c1
end
close c1
deallocate c1
GO
--4.删除主键约束
SET NOCOUNT ON
DECLARE c1 cursor for
select 'alter table ['+ object_name(parent_obj) + '] drop constraint ['+name+']; '
from sysobjects
where xtype = 'PK'
open c1
declare @c1 varchar(8000)
fetch next from c1 into @c1
while(@@fetch_status=0)
begin
exec(@c1)
fetch next from c1 into @c1
end
close c1
deallocate c1
GO
--5.修改排序规则
SET NOCOUNT ON
DECLARE @S NVARCHAR(1000)
DECLARE C CURSOR FOR --不区分大小写
SELECT 'ALTER TABLE ['+TABLE_NAME+'] ALTER COLUMN ['+COLUMN_NAME+'] '
+ DATA_TYPE
+ CASE WHEN DATA_TYPE IN('TEXT','NTEXT') THEN '' ELSE
QUOTENAME(CHARACTER_MAXIMUM_LENGTH,'(')
END
+ ' COLLATE CHINESE_PRC_CI_AS_WS '
+ CASE IS_NULLABLE WHEN 'NO' THEN ' NOT NULL ' ELSE '' END
FROM INFORMATION_SCHEMA.COLUMNS
WHERE DATA_TYPE IN('varchar','nvarchar','char','nchar','text','ntext')
OPEN C
FETCH C INTO @S
WHILE @@FETCH_STATUS=0
BEGIN
EXEC(@S)
FETCH C INTO @S
END
CLOSE C
DEALLOCATE C
GO
--6.重新创建主键约束(执行导出的脚本)
--7.重新创建外键约束脚本(执行导出的脚本)