方法一：
--生成数据库脚本的方法最快,处理的也最好
sql2000企业管理器
--右键要清理的数据库
--所有任务
--生成SQL脚本
--<常规>里选择"生成全部对象脚本"","在脚本文件中包含说明性标题"选上
--<设置格式>里,将"包含扩展属性",选上
--<选项>中,将"表脚本选项"中的内容全部选择上
--<选项>中,全选
--其他所有的选项保持默认值
--然后确定,将其保存成一个.sql文件
然后断开对对要清空数据库的连接,查询分析器中执行上面的sql文件就可以了.
方法二：
1
--
Use 数据库名称
2
use
databasename
3
--
第一部分，生成建立外键的语句保存到#tmp
4
declare
@name
varchar
(
200
),
@tmp1
varchar
(
500
),
@tmp2
varchar
(
500
)
5
6
create
table
#tmp
7(
8string
varchar
(
8000
)
9)
10
11
SELECT
表名称
=
object_name
(b.fkeyid)
12 ,外键名称
=
a.name
13 ,引用的列名
=
(
SELECT
name
FROM
syscolumns
WHERE
colid
=
b.fkey
AND
id
=
b.fkeyid)
14 ,引用的表名
=
object_name
(b.rkeyid)
15 ,已引用的列名
=
(
SELECT
name
FROM
syscolumns
WHERE
colid
=
b.rkey
AND
id
=
b.rkeyid)
16
into
#t
FROM
sysobjects a
17
join
sysforeignkeys b
on
a.id
=
b.constid
18
join
sysobjects c
on
a.parent_obj
=
c.id
19
where
a.xtype
=
'
f
'
AND
c.xtype
=
'
U
'
20
21
declare
cur_test
cursor
for
22
select
a.name
from
sysobjects a
join
sysobjects c
on
a.parent_obj
=
c.id
where
a.xtype
=
'
f
'
and
c.xtype
=
'
U
'
23
open
cur_test
24
FETCH
NEXT
FROM
cur_test
INTO
@name
25
WHILE
(
@@fetch_status
<>
-
1
)
26
BEGIN
27
IF
(
@@fetch_status
<>
-
2
)
28
BEGIN
29
select
@tmp1
=
''
,
@tmp2
=
''
30
select
@tmp1
=
@tmp1
+
'
[
'
+
引用的列名
+
'
],
'
,
@tmp2
=
@tmp2
+
'
[
'
+
已引用的列名
+
'
],
'
from
#t
where
外键名称
=
@name
31
insert
into
#tmp
select
top
1
'
ALTER TABLE [DBO].[
'
+
表名称
+
'
] ADD CONSTRAINT [
'
+
@name
+
'
] FOREIGN KEY (
'
+
left
(
@tmp1
,
len
(
@tmp1
)
-
1
)
+
'
) REFERENCES [
'
+
引用的表名
+
'
] (
'
+
left
(
@tmp2
,
len
(
@tmp2
)
-
1
)
+
'
)
'
from
#t
where
外键名称
=
@name
32
END
33
FETCH
NEXT
FROM
cur_test
INTO
@name
34
END
35
36
CLOSE
cur_test
37
DEALLOCATE
cur_test
38
drop
table
#t
39
40
--
第二部分，删除所有外键
41
DECLARE
@STRING
VARCHAR
(
8000
)
42
WHILE
EXISTS
(
SELECT
NAME
FROM
SYSOBJECTS
WHERE
TYPE
=
'
F
'
)
43
BEGIN
44
SELECT
@STRING
=
'
ALTER TABLE
'
+
B.NAME
+
'
DROP CONSTRAINT
'
+
A.NAME
+
CHAR
(
13
)
45
FROM
(
SELECT
PARENT_OBJ,NAME
FROM
SYSOBJECTS
WHERE
TYPE
=
'
F
'
) A,
46 (
SELECT
ID,NAME
FROM
SYSOBJECTS
WHERE
OBJECTPROPERTY
(ID, N
'
ISUSERTABLE
'
)
=
1
) B
47
WHERE
A.PARENT_OBJ
=
B.ID
48
EXEC
(
@STRING
)
49
END
50
51
--
第三部分，删除所有表的记录，并且把identity复位
52
exec
sp_msforeachtable "
truncate
table
?"
53
54
--
第四部分，执行#tmp里面的建立外键的语句，恢复外键
55
declare
cur_test2
cursor
for
select
string
from
#tmp
56
57
open
cur_test2
58
FETCH
NEXT
FROM
cur_test2
INTO
@string
59
WHILE
(
@@fetch_status
<>
-
1
)
60
BEGIN
61
IF
(
@@fetch_status
<>
-
2
)
62
BEGIN
63
exec
(
@string
)
64
PRINT
@STRING
65
END
66
FETCH
NEXT
FROM
cur_test2
INTO
@string
67
END
68
69
CLOSE
cur_test2
70
DEALLOCATE
cur_test2
71
72
drop
table
#tmp
73
74
--
Use 数据库名称
2
use
databasename 3
--
第一部分，生成建立外键的语句保存到#tmp
4
declare
@name
varchar
(
200
),
@tmp1
varchar
(
500
),
@tmp2
varchar
(
500
)5
6
create
table
#tmp7
(8
string
varchar
(
8000
)9
)10
11
SELECT
表名称
=
object_name
(b.fkeyid)12
,外键名称
=
a.name13
,引用的列名
=
(
SELECT
name
FROM
syscolumns
WHERE
colid
=
b.fkey
AND
id
=
b.fkeyid)14
,引用的表名
=
object_name
(b.rkeyid)15
,已引用的列名
=
(
SELECT
name
FROM
syscolumns
WHERE
colid
=
b.rkey
AND
id
=
b.rkeyid)16
into
#t
FROM
sysobjects a17
join
sysforeignkeys b
on
a.id
=
b.constid18
join
sysobjects c
on
a.parent_obj
=
c.id19
where
a.xtype
=
'
f
'
AND
c.xtype
=
'
U
'
20
21
declare
cur_test
cursor
for
22
select
a.name
from
sysobjects a
join
sysobjects c
on
a.parent_obj
=
c.id
where
a.xtype
=
'
f
'
and
c.xtype
=
'
U
'
23
open
cur_test24
FETCH
NEXT
FROM
cur_test
INTO
@name
25
WHILE
(
@@fetch_status
<>
-
1
)26
BEGIN
27
IF
(
@@fetch_status
<>
-
2
)28
BEGIN
29
select
@tmp1
=
''
,
@tmp2
=
''
30
select
@tmp1
=
@tmp1
+
'
[
'
+
引用的列名
+
'
],
'
,
@tmp2
=
@tmp2
+
'
[
'
+
已引用的列名
+
'
],
'
from
#t
where
外键名称
=
@name
31
insert
into
#tmp
select
top
1
'
ALTER TABLE [DBO].[
'
+
表名称
+
'
] ADD CONSTRAINT [
'
+
@name
+
'
] FOREIGN KEY (
'
+
left
(
@tmp1
,
len
(
@tmp1
)
-
1
)
+
'
) REFERENCES [
'
+
引用的表名
+
'
] (
'
+
left
(
@tmp2
,
len
(
@tmp2
)
-
1
)
+
'
)
'
from
#t
where
外键名称
=
@name
32
END
33
FETCH
NEXT
FROM
cur_test
INTO
@name
34
END
35
36
CLOSE
cur_test37
DEALLOCATE
cur_test38
drop
table
#t39
40
--
第二部分，删除所有外键
41
DECLARE
@STRING
VARCHAR
(
8000
)42
WHILE
EXISTS
(
SELECT
NAME
FROM
SYSOBJECTS
WHERE
TYPE
=
'
F
'
)43
BEGIN
44
SELECT
@STRING
=
'
ALTER TABLE
'
+
B.NAME
+
'
DROP CONSTRAINT
'
+
A.NAME
+
CHAR
(
13
)45
FROM
(
SELECT
PARENT_OBJ,NAME
FROM
SYSOBJECTS
WHERE
TYPE
=
'
F
'
) A,46
(
SELECT
ID,NAME
FROM
SYSOBJECTS
WHERE
OBJECTPROPERTY
(ID, N
'
ISUSERTABLE
'
)
=
1
) B47
WHERE
A.PARENT_OBJ
=
B.ID48
EXEC
(
@STRING
)49
END
50
51
--
第三部分，删除所有表的记录，并且把identity复位
52
exec
sp_msforeachtable "
truncate
table
?"53
54
--
第四部分，执行#tmp里面的建立外键的语句，恢复外键
55
declare
cur_test2
cursor
for
select
string
from
#tmp56
57
open
cur_test258
FETCH
NEXT
FROM
cur_test2
INTO
@string
59
WHILE
(
@@fetch_status
<>
-
1
)60
BEGIN
61
IF
(
@@fetch_status
<>
-
2
)62
BEGIN
63
exec
(
@string
)64
PRINT
@STRING
65
END
66
FETCH
NEXT
FROM
cur_test2
INTO
@string
67
END
68
69
CLOSE
cur_test270
DEALLOCATE
cur_test271
72
drop
table
#tmp73
74
from: http://topic.csdn.net/t/20040615/16/3094555.html#