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='yg'        --如果要查询特定table,加上这句   
order by
    a.id,a.colorder

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