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问题位置: 第十章 Reduce端连接与分组 一节 第二段文字
在许多数据集中,一条记录与另一条记录存在关联是很常见的:关系模型中的外键,文档模型中的文档引用或图模型中的边。当你需要同时访问这一关联的两侧(持有引用的记录与被引用的记录)时,连接就是必须的。(包含引用的记录和被引用的记录),连接就是必需的。正如第2章所讨论的,非规范化可以减少对连接的需求,但通常无法将其完全移除^v。
其第二句:
当你需要同时访问这一关联的两侧(持有引用的记录与被引用的记录)时,连接就是必须的。(包含引用的记录和被引用的记录),连接就是必需的。
存在重复语句.
应该改为:
当你需要同时访问这一关联的两侧(持有引用的记录与被引用的记录)时,连接就是必须的。
The text was updated successfully, but these errors were encountered:
ISSUE #64
300e3a9
fix issue 64 : #64
Fixed, Thank you~ 300e3a9
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问题位置:
第十章 Reduce端连接与分组 一节 第二段文字
其第二句:
存在重复语句.
应该改为:
The text was updated successfully, but these errors were encountered: