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

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