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   sys.extended_properties   g   on   a.id=g.major_id   and   a.colid=g.minor_id

left   join   sys.extended_properties   f   on   d.id=f.major_id   and   f.minor_id=0

--where   d.name='orders'         --如果只查询指定表,加上此条件

order   by   a.id,a.colorder