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')