https://blog.youkuaiyun.com/qq_22548549zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/qq_22548549/article/details/141758123https://blog.youkuaiyun.com/qq_22548549/article/details/141758123qq_22548549Sun, 01 Sep 2024 22:35:59 +0800 B，现在则变成了 A < B。由此，就有可能破坏数据的唯一性约束。不仅如此，只要索引列包含字符串类型的字段，也会有问题。为了方便继续描述，假设有个 test 表，结构如下。]]>https://blog.youkuaiyun.com/qq_22548549/article/details/141528503https://blog.youkuaiyun.com/qq_22548549/article/details/141528503qq_22548549Sun, 25 Aug 2024 15:44:47 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/141086152https://blog.youkuaiyun.com/qq_22548549/article/details/141086152qq_22548549Sat, 10 Aug 2024 10:34:20 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/138949625https://blog.youkuaiyun.com/qq_22548549/article/details/138949625qq_22548549Thu, 16 May 2024 21:25:32 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/132391605https://blog.youkuaiyun.com/qq_22548549/article/details/132391605qq_22548549Sun, 20 Aug 2023 14:25:46 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/131502857https://blog.youkuaiyun.com/qq_22548549/article/details/131502857qq_22548549Sun, 02 Jul 2023 17:12:32 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/131502816https://blog.youkuaiyun.com/qq_22548549/article/details/131502816qq_22548549Sun, 02 Jul 2023 17:12:05 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/129978412https://blog.youkuaiyun.com/qq_22548549/article/details/129978412qq_22548549Wed, 05 Apr 2023 22:16:46 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128364724https://blog.youkuaiyun.com/qq_22548549/article/details/128364724qq_22548549Sun, 18 Dec 2022 18:46:21 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128364702https://blog.youkuaiyun.com/qq_22548549/article/details/128364702qq_22548549Sun, 18 Dec 2022 18:44:42 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128308642https://blog.youkuaiyun.com/qq_22548549/article/details/128308642qq_22548549Tue, 13 Dec 2022 21:57:53 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128278069https://blog.youkuaiyun.com/qq_22548549/article/details/128278069qq_22548549Sun, 11 Dec 2022 20:04:26 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128278037https://blog.youkuaiyun.com/qq_22548549/article/details/128278037qq_22548549Sun, 11 Dec 2022 19:57:24 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128211803https://blog.youkuaiyun.com/qq_22548549/article/details/128211803qq_22548549Tue, 06 Dec 2022 22:32:44 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128179480https://blog.youkuaiyun.com/qq_22548549/article/details/128179480qq_22548549Sun, 04 Dec 2022 23:49:16 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/128173082https://blog.youkuaiyun.com/qq_22548549/article/details/128173082qq_22548549Sun, 04 Dec 2022 15:29:06 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/78606211https://blog.youkuaiyun.com/qq_22548549/article/details/78606211qq_22548549Wed, 22 Nov 2017 17:35:44 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/78213004https://blog.youkuaiyun.com/qq_22548549/article/details/78213004qq_22548549Thu, 12 Oct 2017 11:35:12 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/78183111https://blog.youkuaiyun.com/qq_22548549/article/details/78183111qq_22548549Mon, 09 Oct 2017 15:32:01 +0800https://blog.youkuaiyun.com/qq_22548549/article/details/78175572https://blog.youkuaiyun.com/qq_22548549/article/details/78175572qq_22548549Sun, 08 Oct 2017 16:16:12 +0800