sp_columns 'yourTable'
or
select * from syscolumns
不过我一般用这个视图
Create view fielddesc
as
select o.name as oname, c.name as cname,convert(varchar(30),p.value) as value,p.smallid as psmallid,t.name as tname
from syscolumns c
join systypes t on c.xtype = t.xtype
join sysobjects o on o.id=c.id
left join sysproperties p on p.smallid=c.colid and p.id=o.id
where o.xtype='U'