问题描述：
[多选]
The InnoDB engine has a feature known as clustered indexes．InnoDB引擎有一个称为聚集索引的特性。Which three statements are true about clustered indexes as used in InnoDB？对于InnoDB中使用的聚集索引，哪三种说法是正确的？
A．A primary key must exist for creation of a clustered index.
B．A primary key is used as a clustered index. 主键用作聚集索引。
C．A clustered index is a grouping of indexes from different tables into a global index for faster searching.
D．If no indexes exist, a hidden clustered index is generated based on row IDs. 如果不存在索引，则根据行id生成隐藏的聚集索引。
E．A clustered index provides direct access to a page containing row data. 聚集索引提供对包含行数据的页的直接访问。
F．The first unique index is always used as a clustered index and not a primary key.
参考答案：查看无
答案解析：无
☆收藏
答案解析：无
☆收藏
上一篇：Which two statements are true regarding partitioning in MySQL？关于MySQL中的分区，哪两种说法是正确的？（）
下一篇：Which two events will cause a slave server to create a new relay log file？（）哪两个事件将导致从属服务器创建新的中继日志文件？
- 我要回答: 网友(216.73.216.127)
- 热门题目: 1.以下哪一项不属于客户实际支付 2.身故，受益人为未成年人，申请 3.2020版新重大疾病定义中，