目录引言一、with语句的底层运作原理资源获取阶段资源释放阶段二、文件操作实战场景解析场景1：基础文件读写场景2：异常处理进阶场景3：复合资源管理三、自定义上下文管理器四、with语句的性能考量五、实战经验总结引
I have this piece of SQL that is being fed to Mysql. CREATE TABLE pn_history( member INT, action INT,
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