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这种场景太常见了。很多人学SQL，最先接触的就是增删改查这四板斧，然后背几个关键字就觉得自己会了，实际上 ORDER BY 、 INSERT INTO 、 UPDATE 、 DELETE 这四条语句，每一句单独拎出来都有不少值得掰扯的细节。你觉得自己会用，和你在生产环境里真正用好，中间隔着的就是这些细节。

本内容遵循CC 4.0 BY-SA版权协议 本文围绕数据库实验中的INSERT、UPDATE、DELETE三大DML操作展开，深入解析语法扩展、完整性约束 ...

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