问一个较难的sql语句
求一sql语句:从master系统库中搜索出【库AAA】中【表BBB】的所有字段的名称、是否主键、类型、大小、是否为空、默认值、以及描述信息？？

如果不能实现，请问用别的什么方法可以完成这个功能？


非常感谢～～

------解决方案--------------------
--用大版主邹建写的SQL


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 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], ' '),
创建时间=d.crdate
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
left join sysproperties f on d.id=f.id and f.smallid=0
--where d.name= '此处可添加要查询的表名 '
Order by a.id,a.colorder