目录
1、利用uuid函数生成唯一且不规则的主键id2、id实现自动增长1、利用uuid函数生成唯一且不规则的主键id
sql：
CREATE TABLE `test` ( `id` varchar(100) COLLATE utf8_estonian_ci NOT NULL COMMENT '唯一不重复', `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `sex` int(11) DEFAULT NULL, `name` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `username` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `password` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `classes` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `major` int(255) DEFAULT NULL, `QQ` int(20) DEFAULT NULL, `introducemyself` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_estonian_ci ROW_FORMAT=DYNAMIC;
表:
插入语句：
INSERT INTO test(id,sex,name,username,password,classes,major,QQ,introducemyself) VALUE(replace(uuid(), '-', ''),1,"小米","xck","001","八班",265,953190259,"我最牛");
执行了俩次，生成了俩个不同id：
2、id实现自动增长
将类型改为整型，下方选择自动增长
看DDL：
CREATE TABLE `test` ( `id` bigint(100) NOT NULL AUTO_INCREMENT COMMENT '唯一不重复', `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `sex` int(11) DEFAULT NULL, `name` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `username` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `password` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `classes` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, `major` int(255) DEFAULT NULL, `QQ` int(20) DEFAULT NULL, `introducemyself` varchar(255) COLLATE utf8_estonian_ci DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_estonian_ci ROW_FORMAT=DYNAMIC;
插入一条数据，sql：
INSERT INTO test(sex,name,username,password,classes,major,QQ,introducemyself) VALUE(1,"小米","xck","001","八班",265,953190259,"我最牛");
对应数据库变化：
