https://blog.youkuaiyun.com/m0_59337025zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/m0_59337025/article/details/157327198https://blog.youkuaiyun.com/m0_59337025/article/details/157327198m0_59337025Sat, 24 Jan 2026 15:07:04 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/156147612https://blog.youkuaiyun.com/m0_59337025/article/details/156147612m0_59337025Mon, 22 Dec 2025 13:44:43 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/148256273https://blog.youkuaiyun.com/m0_59337025/article/details/148256273m0_59337025Thu, 19 Jun 2025 19:22:38 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/148313033https://blog.youkuaiyun.com/m0_59337025/article/details/148313033m0_59337025Tue, 03 Jun 2025 10:53:59 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/129813481https://blog.youkuaiyun.com/m0_59337025/article/details/129813481m0_59337025Fri, 13 Dec 2024 13:48:21 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/134414850https://blog.youkuaiyun.com/m0_59337025/article/details/134414850m0_59337025Tue, 05 Dec 2023 20:06:32 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/132187872https://blog.youkuaiyun.com/m0_59337025/article/details/132187872m0_59337025Thu, 10 Aug 2023 17:10:59 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/132098484https://blog.youkuaiyun.com/m0_59337025/article/details/132098484m0_59337025Wed, 09 Aug 2023 14:32:06 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/131062366https://blog.youkuaiyun.com/m0_59337025/article/details/131062366m0_59337025Fri, 04 Aug 2023 10:01:53 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/130733870https://blog.youkuaiyun.com/m0_59337025/article/details/130733870m0_59337025Sun, 04 Jun 2023 17:34:53 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/130565892https://blog.youkuaiyun.com/m0_59337025/article/details/130565892m0_59337025Tue, 16 May 2023 20:31:19 +0800class_id和myclass->id形成关联的关系=>外键约束.对上面的示意图进行设计：先创建主键表和从表：我们可以看见约束的体现。主表myclass中没有213班级，从表这时要插入213班级的同学，MySQL就会阻止插入。]]>https://blog.youkuaiyun.com/m0_59337025/article/details/130514824https://blog.youkuaiyun.com/m0_59337025/article/details/130514824m0_59337025Sat, 06 May 2023 21:02:51 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/130510246https://blog.youkuaiyun.com/m0_59337025/article/details/130510246m0_59337025Fri, 05 May 2023 20:28:28 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/130489009https://blog.youkuaiyun.com/m0_59337025/article/details/130489009m0_59337025Fri, 05 May 2023 16:27:37 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/130079502https://blog.youkuaiyun.com/m0_59337025/article/details/130079502m0_59337025Mon, 01 May 2023 23:56:54 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/129861032https://blog.youkuaiyun.com/m0_59337025/article/details/129861032m0_59337025Thu, 06 Apr 2023 17:35:23 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/129838741https://blog.youkuaiyun.com/m0_59337025/article/details/129838741m0_59337025Wed, 29 Mar 2023 17:20:04 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/129711187https://blog.youkuaiyun.com/m0_59337025/article/details/129711187m0_59337025Sat, 25 Mar 2023 16:41:54 +0800https://blog.youkuaiyun.com/m0_59337025/article/details/129583783https://blog.youkuaiyun.com/m0_59337025/article/details/129583783m0_59337025Mon, 20 Mar 2023 21:20:53 +0800TCP/IP协议可靠的将数据从A主机发送到B主机。]]>https://blog.youkuaiyun.com/m0_59337025/article/details/129347311https://blog.youkuaiyun.com/m0_59337025/article/details/129347311m0_59337025Thu, 16 Mar 2023 12:19:39 +0800