https://blog.youkuaiyun.com/s0cketzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/s0cket/article/details/132166323https://blog.youkuaiyun.com/s0cket/article/details/132166323s0cketTue, 08 Aug 2023 14:35:11 +0800https://blog.youkuaiyun.com/s0cket/article/details/132165727https://blog.youkuaiyun.com/s0cket/article/details/132165727s0cketTue, 08 Aug 2023 14:13:58 +0800https://blog.youkuaiyun.com/s0cket/article/details/132165591https://blog.youkuaiyun.com/s0cket/article/details/132165591s0cketTue, 08 Aug 2023 14:05:00 +0800B，B-- >C 如果通过A属性（属性组）的值可以确定唯一B属性的值，再通过B属性（属性组）的值可以确定唯一C属性的值，则称C传递函数依赖于A。设计关系数据库时，遵从不同的规范要求，设计出合理的关系型数据库，这些不同的规范要求被称为不同的范式，各种范式呈递次规范，越高的范式数据库冗余越小。，就是表与表之间的某种约定的关系，由于这种关系的存在，能够让表与表之间的数据，更加的完整，关连性更强。1）函数依赖：A–>B，如果通过A属性（属性组）的值，可以确定唯一B属性的值，则称B依赖于A。]]>https://blog.youkuaiyun.com/s0cket/article/details/129792119https://blog.youkuaiyun.com/s0cket/article/details/129792119s0cketMon, 27 Mar 2023 11:39:13 +0800https://blog.youkuaiyun.com/s0cket/article/details/127953532https://blog.youkuaiyun.com/s0cket/article/details/127953532s0cketSun, 20 Nov 2022 20:32:29 +0800https://blog.youkuaiyun.com/s0cket/article/details/124104297https://blog.youkuaiyun.com/s0cket/article/details/124104297s0cketMon, 11 Apr 2022 17:23:48 +0800https://blog.youkuaiyun.com/s0cket/article/details/123957562https://blog.youkuaiyun.com/s0cket/article/details/123957562s0cketMon, 04 Apr 2022 18:05:16 +0800https://blog.youkuaiyun.com/s0cket/article/details/123893684https://blog.youkuaiyun.com/s0cket/article/details/123893684s0cketFri, 01 Apr 2022 11:32:04 +0800https://blog.youkuaiyun.com/s0cket/article/details/123878759https://blog.youkuaiyun.com/s0cket/article/details/123878759s0cketThu, 31 Mar 2022 17:32:43 +0800https://blog.youkuaiyun.com/s0cket/article/details/123808663https://blog.youkuaiyun.com/s0cket/article/details/123808663s0cketMon, 28 Mar 2022 22:43:26 +0800https://blog.youkuaiyun.com/s0cket/article/details/123590790https://blog.youkuaiyun.com/s0cket/article/details/123590790s0cketSat, 19 Mar 2022 11:03:12 +0800https://blog.youkuaiyun.com/s0cket/article/details/123535102https://blog.youkuaiyun.com/s0cket/article/details/123535102s0cketWed, 16 Mar 2022 20:19:28 +0800https://blog.youkuaiyun.com/s0cket/article/details/123443775https://blog.youkuaiyun.com/s0cket/article/details/123443775s0cketSat, 12 Mar 2022 14:49:53 +0800https://blog.youkuaiyun.com/s0cket/article/details/123412748https://blog.youkuaiyun.com/s0cket/article/details/123412748s0cketThu, 10 Mar 2022 22:09:40 +0800https://blog.youkuaiyun.com/s0cket/article/details/123192058https://blog.youkuaiyun.com/s0cket/article/details/123192058s0cketMon, 28 Feb 2022 20:58:16 +0800https://blog.youkuaiyun.com/s0cket/article/details/123095544https://blog.youkuaiyun.com/s0cket/article/details/123095544s0cketWed, 23 Feb 2022 17:39:16 +0800https://blog.youkuaiyun.com/s0cket/article/details/122914626https://blog.youkuaiyun.com/s0cket/article/details/122914626s0cketSun, 13 Feb 2022 21:37:36 +0800https://blog.youkuaiyun.com/s0cket/article/details/122849226https://blog.youkuaiyun.com/s0cket/article/details/122849226s0cketWed, 09 Feb 2022 20:28:21 +0800https://blog.youkuaiyun.com/s0cket/article/details/122836567https://blog.youkuaiyun.com/s0cket/article/details/122836567s0cketWed, 09 Feb 2022 10:20:48 +0800https://blog.youkuaiyun.com/s0cket/article/details/122203960https://blog.youkuaiyun.com/s0cket/article/details/122203960s0cketTue, 28 Dec 2021 22:04:58 +0800