关键词里的 Recursive CTE 不是可选项，是唯一通路； Minimax 不是点缀，是驱动整个查询执行计划的核心逻辑； DuckDB 不是随便选的玩具库，是因为它对深度递归、复杂窗口函数和内存内计算的极致支持，远超PostgreSQL默认配置，更甩开SQLite几条街。 适合谁看？

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