删除数据库的所有存储过程、主键、外键、索引等

--删除存储过程
DECLARE @STRING VARCHAR(8000)
WHILE EXISTS(SELECT NAME FROM SYSOBJECTS WHERE TYPE=@#P@# AND STATUS>=0)
BEGIN
 SELECT TOP 1 @STRING=@#DROP  PROCEDURE @#+NAME  FROM   SYSOBJECTS    WHERE   TYPE = @#P@# AND STATUS>=0
 --SELECT @STRING
 EXEC(@STRING)
END

GO

--默认值或 DEFAULT 约束
DECLARE @STRING VARCHAR(8000)
WHILE EXISTS(SELECT NAME FROM SYSOBJECTS WHERE XTYPE=@#D@#)
BEGIN
 SELECT top 1 @STRING=@#ALTER TABLE @#+B.NAME+@# DROP CONSTRAINT @#+A.NAME
  FROM (SELECT PARENT_OBJ,NAME FROM SYSOBJECTS WHERE XTYPE=@#D@#) A,
        (SELECT ID,NAME FROM SYSOBJECTS WHERE OBJECTPROPERTY(ID, N@#ISUSERTABLE@#) = 1) B
    WHERE A.PARENT_OBJ=B.ID
 EXEC(@STRING)
END

GO

--UNIQUE 约束
DECLARE @STRING VARCHAR(8000)
WHILE EXISTS(SELECT NAME FROM SYSOBJECTS WHERE XTYPE=@#UQ@#)
BEGIN
 SELECT top 1 @STRING=@#ALTER TABLE @#+B.NAME+@# DROP CONSTRAINT @#+A.NAME
  FROM (SELECT PARENT_OBJ,NAME FROM SYSOBJECTS WHERE XTYPE=@#UQ@#) A,
        (SELECT ID,NAME FROM SYSOBJECTS WHERE OBJECTPROPERTY(ID, N@#ISUSERTABLE@#) = 1) B
    WHERE A.PARENT_OBJ=B.ID
 EXEC(@STRING)
END

GO

--FOREIGN KEY 约束
DECLARE @STRING VARCHAR(8000)
WHILE EXISTS(SELECT NAME FROM SYSOBJECTS WHERE TYPE=@#F@#)
BEGIN
 SELECT top 1 @STRING=@#ALTER TABLE @#+B.NAME+@# DROP CONSTRAINT @#+A.NAME
  FROM (SELECT PARENT_OBJ,NAME FROM SYSOBJECTS WHERE TYPE=@#F@#) A,
        (SELECT ID,NAME FROM SYSOBJECTS WHERE OBJECTPROPERTY(ID, N@#ISUSERTABLE@#) = 1) B
    WHERE A.PARENT_OBJ=B.ID
 EXEC(@STRING)
END

GO

--PRIMARY KEY 约束
DECLARE @STRING VARCHAR(8000)
WHILE EXISTS(SELECT NAME FROM SYSOBJECTS WHERE XTYPE=@#PK@#)
BEGIN
 SELECT top 1 @STRING=@#ALTER TABLE @#+B.NAME+@# DROP CONSTRAINT @#+A.NAME
  FROM (SELECT PARENT_OBJ,NAME FROM SYSOBJECTS WHERE XTYPE=@#PK@#) A,
        (SELECT ID,NAME FROM SYSOBJECTS WHERE OBJECTPROPERTY(ID, N@#ISUSERTABLE@#) = 1) B
    WHERE A.PARENT_OBJ=B.ID
 EXEC(@STRING)
END

GO

--触发器
DECLARE @STRING VARCHAR(8000)
WHILE EXISTS(SELECT NAME FROM SYSOBJECTS WHERE XTYPE=@#TR@#)
BEGIN
 SELECT top 1 @STRING=@#DROP TRIGGER @#+NAME FROM SYSOBJECTS WHERE XTYPE=@#TR@#
 EXEC(@STRING)
END

GO

 

--索引
declare @string varchar(8000)
while exists(
 select TABLE_NAME= o.name,INDEX_NAME= x.name
  from sysobjects o, sysindexes x, syscolumns c, sysindexkeys xk
  where o.type in (@#U@#)
  and convert(bit,(x.status & 0x800)/0x800)=0
  and x.id = o.id
  and o.id = c.id
  and o.id = xk.id
  and x.indid = xk.indid
  and c.colid = xk.colid
  and xk.keyno <= x.keycnt
  and permissions(o.id, c.name) <> 0
  and     (x.status&32) = 0  -- No hypothetical indexes
  group by o.name,x.name)
begin
select top 1 @string=@#drop index @#+o.name+@#.@#+ x.name
  from sysobjects o, sysindexes x, syscolumns c, sysindexkeys xk
  where o.type in (@#U@#)
  and convert(bit,(x.status & 0x800)/0x800)=0
  and x.id = o.id
  and o.id = c.id
  and o.id = xk.id
  and x.indid = xk.indid
  and c.colid = xk.colid
  and xk.keyno <= x.keycnt
  and permissions(o.id, c.name) <> 0
  and     (x.status&32) = 0  -- No hypothetical indexes
  group by o.name,x.name
exec(@string)
end

 

GO

原文转自：http://www.ltesting.net