Beginner score
48/100
Competition workspace
适合熟悉 SQL 查询优化和 MySQL/TXSQL 数据库内核或执行框架的开发者，也适合能处理多表关联、嵌套子查询、CTE 等复杂查询的团队。可个人或组队参赛；也欢迎尝试结合大模型进行 SQL 改写的开发者。
Suggested next step
Decide whether this contest fits your current stage before you sink time into the leaderboard.
Beginner score
48/100
Learning value
60/100
Estimated effort
12-40 hours
Metric
Official scoring is published on the Op…
适合熟悉 SQL 查询优化和 MySQL/TXSQL 数据库内核或执行框架的开发者，也适合能处理多表关联、嵌套子查询、CTE 等复杂查询的团队。可个人或组队参赛；也欢迎尝试结合大模型进行 SQL 改写的开发者。
If the items below still feel unfamiliar, you usually get a better result by preparing first instead of rushing in.
SQL 查询优化
关系代数与查询语义
MySQL/TXSQL 优化器
多表关联与子查询
CTE 查询改写
TPC-DS 基准测试
The real friction is usually not library usage. It is validation, time allocation, and task framing.
核心难点是把低效 SQL 自动改写为更高效的等价查询：不仅要覆盖复杂查询场景并证明实际加速效果，还必须严格保证改写前后的语义等价。作品还需能正常运行，并在专属代码仓库中提交代码及设计材料；获奖作品须按要求开源。
This guide is the best pre-read if you want a cleaner start instead of trial-and-error.
How to learn feature engineering, validation, and competition workflow without heavy hardware.
No GPU? Pick Competitions That Still Teach You Good HabitsUse these fields to make a quick decision before you dive deeper.
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