mysql5.7查看表結構命令show full columns from t_user

show full columns from t_user;   查看表全部結構。

Key = PRI     主鍵

Key = UNI     唯一索引

Key = MUL    普通索引

 這張表的完整表結構長這樣：

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;

表結構截圖：

表索引結構：

 

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