{
  "slug": "mysql-transaction-isolation",
  "name": "MySQL 事务与隔离机制",
  "description": "四种隔离级别、脏读/不可重复读/幻读、MVCC Read View 选版本逻辑、Repeative Read 与 Next-Key Lock",
  "tags": [
    "MVCC",
    "Read View",
    "undo log",
    "不可重复读",
    "临键锁",
    "幻读",
    "当前读",
    "快照读",
    "版本链",
    "脏读",
    "行锁",
    "间隙锁",
    "隔离级别"
  ],
  "difficulty_range": [
    1,
    4
  ],
  "schema_version": "1.0.0",
  "updated": "2026-09-07",
  "question_files": [
    "single_choice",
    "fill_blank",
    "code_reading",
    "short_answer"
  ],
  "stats": {
    "total": 35,
    "by_type": {
      "single_choice": 10,
      "fill_blank": 10,
      "code_reading": 5,
      "short_answer": 10
    }
  }
}