text: CREATE TABLE `t_sharding_0` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `app_id` VARCHAR(10) NOT NULL,
    `num` INT NOT NULL,
    PRIMARY KEY (`id`));
  
  CREATE TABLE `t_sharding_1` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `app_id` VARCHAR(10) NOT NULL,
    `num` INT NOT NULL,
    PRIMARY KEY (`id`));
  
  CREATE TABLE `t_sharding_2` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `app_id` VARCHAR(10) NOT NULL,
    `num` INT NOT NULL,
    PRIMARY KEY (`id`));
  
  CREATE TABLE `t_sharding_3` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `app_id` VARCHAR(10) NOT NULL,
    `num` INT NOT NULL,
    PRIMARY KEY (`id`));
  
  CREATE TABLE `t_other` (
    `id` INT NOT NULL AUTO_INCREMENT,
    `user_name` VARCHAR(10) NOT NULL,
    `age` INT NOT NULL,
    PRIMARY KEY (`id`));