sql2000 问题

if exists(select * from sysobjects where name=N 'billtype' and objectproperty(id,N'isusertable')=1)
begin
drop table billtype
CREATE TABLE [billtype] (
[ID] [int] IDENTITY (1, 1) NOT NULL ,
[billtypeid] [int] NOT NULL ,
[billtypename] [varchar] (20) COLLATE Chinese_PRC_CI_AS NOT NULL ,
CONSTRAINT [PK_billtype] PRIMARY KEY CLUSTERED
(
[ID]
) ON [PRIMARY]
) ON [PRIMARY]
end
else
begin
CREATE TABLE [billtype] (
[ID] [int] IDENTITY (1, 1) NOT NULL ,
[billtypeid] [int] NOT NULL ,
[billtypename] [varchar] (20) COLLATE Chinese_PRC_CI_AS NOT NULL ,
CONSTRAINT [PK_billtype] PRIMARY KEY CLUSTERED
(
[ID]
) ON [PRIMARY]
) ON [PRIMARY]

end

服务器: 消息 170，级别 15，状态 1，行 1
第 1 行: 'billtype' 附近有语法错误。
服务器: 消息 156，级别 15，状态 1，行 14
在关键字 'else' 附近有语法错误。

这个问题出在哪？有谁能解答一下？在sql2000查询中出现的问题！

注意！！

where name=N 'billtype' and objectproperty(id,N'isusertable')=1)
N后面有一个空格，去掉空格！

1.把N去掉

if exists(select * from sysobjects where name='billtype' and objectproperty(id,N'isusertable')=1)

2. 是不是多了个 on [primary] ?