SELECT
      (case when a.colorder=1 then d.name else ‘‘ end)表名,
      d.name 表名1,
      a.colorder 字段序号,
      a.name 字段名,
      (case when COLUMNPROPERTY( a.id,a.name,‘IsIdentity‘)=1 then ‘√‘else ‘‘ end) 标识,
      (case when (SELECT count(*)
      FROM sysobjects
      WHERE (name in
                (SELECT name
               FROM sysindexes
               WHERE (id = a.id) AND (indid in
                         (SELECT indid
                        FROM sysindexkeys
                        WHERE (id = a.id) AND (colid in
                                  (SELECT colid
                                 FROM syscolumns
                                 WHERE (id = a.id) AND (name = a.name))))))) AND
             (xtype = ‘PK‘))>0 then ‘√‘ else ‘‘ end) 主键,
      (case when b.name=‘nvarchar‘ then b.name+‘(‘+convert(nvarchar(100),columnproperty(a.id,a.name,‘PRECISION‘))+‘)‘ else b.name end) 类型,
      a.length 占用字节数,
      columnproperty(a.id,a.name,‘PRECISION‘) as 长度,
      isnull(COLUMNPROPERTY(a.id,a.name,‘Scale‘),0) as 小数位数,
      (case when a.isnullable=1 then ‘是‘else ‘否‘ end) 允许空,
      isnull(e.text,‘‘) 默认值,
      isnull(g.value,‘‘) AS 字段说明 
FROM  syscolumns  a left join systypes b
on  a.xtype=b.xusertype
inner join sysobjects d
on a.id=d.id  and  d.xtype=‘U‘ 
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 
where 1=1
--and d.name=‘t_test‘ --指定单个表名
order by d.name,a.id,a.colorder