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