SQL 判断字段类型语句

-->Title:Generating test data
-->Author:wufeng4552
-->Date :2009-09-25 09:56:07
if object_id('tb')is not null drop table tb
go
create table tb(ID int,name text)
insert tb select 1,'test'
go
--方法1

select sql_variant_property(ID,'BaseType') from tb

--方法2

select object_name(ID)表名, 
c.name 字段名, 
t.name 数据类型, 
c.prec 长度 
from syscolumns c 
inner join systypes t 
on c.xusertype=t.xusertype 
where objectproperty(id,'IsUserTable')=1 and id=object_id('tb')