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   parent_obj=a.id   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