sql 查询表的所有详细信息

SELECT
(case when a.colorder=1 then d.name else '' end) as 表名,--如果表名相同就返回空
     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--查询主键
                     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,--查询主键END
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 sys.extended_properties g
on a.id=g.major_id AND a.colid = g.minor_id
     where d.name='TestTable' --所要查询的表
order by a.id,a.colorder