system/db/11 #53
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外部排序总寻道次数最后是 -1 哦 |
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3.2 Cost Analysis 的例子,final pass 是要 written back 到 disk 的,题目有加粗斜体强调,所以要额外加上 write back 的成本,Gemini 没错,选 C 没问题(几年前的历年卷,这道题选 A 只给一半的分) |
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system/db/11
NoughtQ的笔记本,主要记录一些 CS 相关的笔记
https://note.noughtq.top/system/db/11
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