iHotel_student_houtai/target/classes/mapper/template/ClassScheduleMapper.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.template.mapper.ClassScheduleMapper">


    <select id="remarks" resultType="java.lang.String">
        SELECT
        GROUP_CONCAT( cs.remark )
        FROM
        `class_schedule` cs
        <where>
            cs.deleted=0
            and cs.date_time = #{localDate}
            <if test="teacherName != null and teacherName != ''">
                and cs.jsxm like '%' #{teacherName} '%'
            </if>
        </where>
        GROUP BY date_time
    </select>
</mapper>