{
  "slug": "database-advanced",
  "name": "数据库进阶",
  "description": "B+树索引优化、EXPLAIN执行计划、Redis集群/哨兵、混合持久化、慢查询优化",
  "tags": [],
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    "true_false",
    "fill_blank",
    "short_answer",
    "code_reading"
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  "stats": {
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  "created": "2026-09-09",
  "updated": "2026-09-09"
}