索引_举例：IO成本：全表扫描<走索引
- WBOYOriginal
- 2016-06-07 15:54:451297browse
索引实验： 目的： 举例全表扫描IO成本小于走索引。
索引实验：
目的：
举例全表扫描IO成本小于走索引。
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