vault backup: 2026-05-21 19:31:28
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@@ -20,6 +20,7 @@ create time: 2026-05-20 23:55
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| 16 | [[hhs/MySQL/03-索引与查询优化/16-慢查询日志分析]] | 抓出执行慢的 SQL、用工具分析根因 |
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| 17 | [[hhs/MySQL/03-索引与查询优化/17-查询改写技巧]] | OR → UNION ALL、JOIN → EXISTS,同样的结果写法影响性能 |
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| 18 | [[hhs/MySQL/03-索引与查询优化/18-深分页优化]] | `LIMIT 1000000, 20` 为什么慢、怎么优化 |
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| — | [[索引失效情况]] | 拓展:索引失效的十大典型场景与排查速查 |
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## 关联笔记
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