-- 删除并重建数据的脚本
use information_schema;
drop database if exists db_teach_2201;
create database db_teach_2201 default charset utf8mb4 collate utf8mb4_general_ci;
use db_teach_2201;

use information_schema;
drop database if exists db_teach_2202;
create database db_teach_2202 default charset utf8mb4 collate utf8mb4_general_ci;
use db_teach_2202;

use information_schema;
drop database if exists db_teach_2301;
create database db_teach_2301 default charset utf8mb4 collate utf8mb4_general_ci;
use db_teach_2301;