sql查询字段以及数据类型

SELECT
       (case when a.colorder=1 then d.name else '' end) as 表名,
       a.colorder as 字段序号,
       a.name as 字段名,
       (case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) as 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) as 主键,
       b.name as 类型,
       a.length as 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 '√'else '' end) as 允许空,
       isnull(e.text,'') as 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' 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
order by a.id,a.colorder