判断MSSQL表/存储过程/视图是否存在

if exists (select top 1 * from sysobjects where id = object_id(N'[所有者.]表名') and type='U')

if object_id('tempdb..##temp') is not null

if exists (select top 1 * from sysobjects where id=object_id('[所有者.]存储过程名') and type='P') 

if exists (select top 1 * from sysobjects where id=object_id('[所有者.]视图名') and type='V')