EAI-Backend/src/main/resources/mapper/AssignmentMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.njuzr.eaibackend.mapper.AssignmentMapper">

    <select id="selectByCourseId" resultType="com.njuzr.eaibackend.po.Assignment">
        SELECT * FROM assignment
        WHERE course_id = #{courseId}
        ORDER BY create_time DESC
    </select>
</mapper>