每逢考试结束，老师们最头疼的不是阅卷，而是如何安全、高效地把成绩发给每位家长。直接在群里公布成绩单？隐私泄露风险大，容易引发家长之间的比较和焦虑；逐个私信？耗时耗力，效率极低，还容易漏发错发；用网盘链接分享表格？操作复杂，部分家长不会用，且文件一旦外泄，后果难控。成绩本是教学反馈的重要工具，却因发布方式不当，演变成家校沟通的“雷区”。

Oracle数据库由Sun公司推出，是一款成熟的企业级集成数据库系统，在容错性与兼容性方面表现突出。接下来将介绍其常见的日常操作内容，帮助用户更好地进行管理和维护工作。

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