Sql Sever查询表的字段信息

--sqlserver 查询某个表的列名称、说明、备注、类型等
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 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 = '数据库表名' --如果只查询指定表,加上此where条件，tablename是要查询的表名；去除where条件查询所有的表信息
order by 
  a.id, 
  a.colorder