显示表结构的SQL

select
 表名=case when a.colorder=1 then d.name else '' end,
 表说明=case when a.colorder=1 then isnull(f.value,'') else '' end,
 字段序号=a.colorder, 字段名=a.name,
 标识=case when columnproperty( a.id,a.name,'isidentity')=1 then '√'else '' end,
 主键=case when exists(select 1
           from sysobjects
    where xtype='pk' and name in ( select name
          from sysindexes
                 where indid in( select indid
            from sysindexkeys
               where id = a.id and colid=a.colid )
                    )
         ) then '√' else '' end,
 类型=b.name,
 占用字节数=a.length,
 长度=columnproperty(a.id,a.name,'precision'),
 小数位数=isnull(columnproperty(a.id,a.name,'scale'),0),
 允许空=case when a.isnullable=1 then '√'else '' end,
 默认值=isnull(e.text,''),
 字段说明=isnull(g.[value],'')
from syscolumns a
 left join systypes b on a.xusertype=b.xusertype
 inner join sysobjects d on a.id=d.id and d.xtype='u' and d.name<>'dtproperties'
 left join syscomments e on a.cdefault=e.id
 left join sysproperties g on a.id=g.id and a.colid=g.smallid
 left join sysproperties f on d.id=f.id and f.smallid=0
 --where d.name='要查询的表' --如果只查询指定表,加上此条件
order by a.id,a.colorder