请问：if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[PerPersonData]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)中的object_id(N'[dbo].[PerPersonData]')是什么意思？那个object_id函数？那个N？还有OBJECTPROPERTY(id, N'IsUserTable') = 1中的OBJECTPROPERTY函数是什么意思？那个＝1又是什么意思 Read More
