mysql5.7查看表结构命令show full columns from t_user

show full columns from t_user;   查看表全部结构。

Key = PRI     主键

Key = UNI     唯一索引

Key = MUL    普通索引

 这张表的完整表结构长这样：

CREATE TABLE `t_user`  (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT \'primary key\',
  `username` varchar(40) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL COMMENT \'user name\',
  `age` int(4) NOT NULL DEFAULT 20 COMMENT \'user age\',
  `birthday_date_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT \'user birthday\',
  `remark` varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL COMMENT \'remark something\',
  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT \'create time\',
  `version` int(4) NOT NULL DEFAULT 0 COMMENT \'update version\',
  PRIMARY KEY (`id`) USING BTREE,
  UNIQUE INDEX `idx_name`(`username`) USING BTREE,
  INDEX `idx_age_remark`(`age`, `remark`) USING BTREE,
  INDEX `idx_create_time`(`create_time`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_bin ROW_FORMAT = DYNAMIC;

表结构截图：

表索引结构：

 

end.