cooleshow/cooleshow-user/user-biz/src/main/resources/config/mybatis/TeacherMapper.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.yonge.cooleshow.biz.dal.dao.TeacherDao">
    <resultMap id="BaseResultMap" type="com.yonge.cooleshow.biz.dal.entity.Teacher">
        <result column="user_id_" property="userId"/>
        <result column="education_background_" property="educationBackground"/>
        <result column="graduate_school_" property="graduateSchool"/>
        <result column="technical_titles_" property="technicalTitles"/>
        <result column="work_unit_" property="workUnit"/>
        <result column="subject_id_" property="subjectId"/>
        <result column="default_subject_" property="defaultSubject"/>
        <result column="introduction_" property="introduction"/>
        <result column="subject_" property="subject"/>
        <result column="grad_certificate_" property="gradCertificate"/>
        <result column="degree_certificate_" property="degreeCertificate"/>
        <result column="teacher_certificate_" property="teacherCertificate"/>
        <result column="entry_flag_" property="entryFlag"/>
        <result column="entry_auth_date_" property="entryAuthDate"/>
        <result column="musician_flag_" property="musicianFlag"/>
        <result column="musician_date_" property="musicianDate"/>
        <result column="member_rank_setting_id_" property="memberRankSettingId"/>
        <result column="membership_start_time_" property="membershipStartTime"/>
        <result column="membership_end_time_" property="membershipEndTime"/>
        <result column="live_flag_" property="liveFlag"/>
        <result column="live_date_" property="liveDate"/>
        <result column="music_date_" property="musicDate"/>
        <result column="video_date_" property="videoDate"/>
        <result column="style_date_" property="styleDate"/>
        <result column="degree_date_" property="degreeDate"/>
        <result column="teacher_date_" property="teacherDate"/>
        <result column="degree_flag_" property="degreeFlag"/>
        <result column="teacher_flag_" property="teacherFlag"/>
        <result column="browse_" property="browse"/>
        <result column="memo_" property="memo"/>
        <result column="lock_flag_" property="lockFlag"/>
        <result column="is_settlement_" property="isSettlement"/>
        <result column="is_test_user_" property="isTestUser"/>
        <result column="tenant_id_" property="tenantId"/>
        <result column="settlement_from_" property="settlementFrom"/>
        <result column="create_time_" property="createTime"/>
        <result column="update_time_" property="updateTime"/>
        <result column="im_device_id_" property="imDeviceId"/>
        <result column="customer_service_" property="customerService"/>
        <result column="customer_id_" property="customerId"/>
    </resultMap>

    <resultMap id="HotTeacherVoMap" type="com.yonge.cooleshow.biz.dal.vo.HotTeacherVo">
        <result column="user_id_" property="userId"/>
        <result column="avatar_" property="avatar"/>
        <result column="graduate_school_" property="graduateSchool"/>
        <result column="username_" property="username"/>
        <result column="isLiving_" property="isLiving"/>
        <result column="fansNum" property="fansNum"/>
    </resultMap>

    <!-- 表字段 -->
    <sql id="baseColumns">
        t.user_id_ as "userId"
        , t.education_background_ as "educationBackground"
        , t.graduate_school_ as "graduateSchool"
        , t.technical_titles_ as "technicalTitles"
        , t.work_unit_ as "workUnit"
        , t.subject_id_ as "subjectId"
         , t.default_subject_ as defaultSubject
        , t.introduction_ as "introduction"
        , t.subject_ as "subject"
        , t.grad_certificate_ as "gradCertificate"
        , t.degree_certificate_ as "degreeCertificate"
        , t.teacher_certificate_ as "teacherCertificate"
        , t.entry_flag_ as "entryFlag"
        , t.entry_auth_date_ as "entryAuthDate"
        , t.musician_flag_ as "musicianFlag"
        , t.musician_date_ as "musicianDate"
        , t.live_flag_ as "liveFlag"
        , t.music_date_ as "musicDate"
        , t.video_date_ as "videoDate"
        , t.style_date_ as "styleDate"
        , t.degree_date_ as "degreeDate"
        , t.teacher_date_ as "teacherDate"
        , t.degree_flag_ as "degreeFlag"
        , t.teacher_flag_ as "teacherFlag"
        , t.member_rank_setting_id_ as "memberRankSettingId"
<!--        , t.membership_start_time_ as "membershipStartTime"-->
<!--        , t.membership_end_time_ as "membershipEndTime"-->
        , t.browse_ as "browse"
        , t.memo_ as "memo"
        , t.tag_ as "tag"
        , t.is_settlement_ as "isSettlement"
        , t.is_test_user_ as "isTestUser"
        , t.create_time_ as "createTime"
        , t.update_time_ as "updateTime"
        , t.train_time_ as trainTime
        , t.evaluate_time_ as evaluateTime
        , t.tenant_id_ as tenantId
        , t.settlement_from_ as settlementFrom
        , t.im_device_id_ as imDeviceId
        , t.customer_service_ as customerService
        , t.customer_id_ as customerId
        , t.im_customer_id_ AS imCustomerId
    </sql>

    <!-- 分页查询 -->
    <select id="selectPage" resultType="com.yonge.cooleshow.biz.dal.vo.TeacherVo">
        SELECT
        <include refid="baseColumns"/>,
        if(u.lock_flag_ = 0 and t.lock_flag_ = 0,0,1) as lockFlag,
        u.username_ as username,
        u.phone_ as phone,
        u.real_name_ as realName,
        u.avatar_ as avatar,
        u.birthdate_ as birthdate,
        u.gender_ as gender,
<!--        (case when t.membership_end_time_ &gt;= now() then 1 else 0 end) isVip,-->
        <!--            t.tag_ tag,-->
        u.del_flag_ as delFlag,
        ifnull(vcr2.vip_type_ ,'NORMAL') as vipType,
        max(if(vcr.vip_type_ = 'VIP', vcr.end_time_, null)) vipEndTime,
        max(if(vcr.vip_type_ = 'SVIP' and vcr.type_ = 'PERPETUAL', vcr.end_time_ , null)) perSvipEndTime,
        max(if(vcr.vip_type_ = 'SVIP', vcr.end_time_, null)) svipEndTime,
        max(vcr.end_time_) currentVipEndTime,
        (case when isnull(u.id_card_no_) then 0 else 1 end) as isReal,
        (case when isnull(b.user_id_) then 0 else 1 end) as isBank,
        (case when t.tenant_id_ = -1 then '平台' else ti.name_ end) as tenantName
        FROM teacher t
        left join sys_user u on t.user_id_ = u.id_
        left join (
        select distinct user_id_ from user_bank_card where del_flag_ = 0
        ) b on t.user_id_ = b.user_id_
        left join tenant_info ti on t.tenant_id_ = ti.id_
        left join vip_card_record vcr on t.user_id_ = vcr.user_id_ and vcr.efficient_flag_ = 1 and vcr.client_type_='TEACHER'
        left join vip_card_record vcr2 on t.user_id_ = vcr2.user_id_ and vcr2.efficient_flag_ = 1 and vcr2.end_time_ > now() and now() >= vcr2.start_time_ and vcr2.client_type_='TEACHER'
        <where>
            <if test="null != param.search and '' != param.search">
                AND (
                t.user_id_ LIKE CONCAT('%', #{param.search}, '%') or
                u.username_ LIKE CONCAT('%', #{param.search}, '%') or
                u.real_name_ LIKE CONCAT('%', #{param.search}, '%') or
                u.phone_ LIKE CONCAT('%', #{param.search}, '%')
                )
            </if>
            <if test="null != param.teacherType and '' != param.teacherType">
                and (
                1=0
                <if test='param.teacherType.contains("TOURIST")'>
                    or (t.entry_flag_ = 0 and t.musician_flag_ = 0)
                </if>
                <if test='param.teacherType.contains("ENTRY")'>
                    or t.entry_flag_ = 1
                </if>
                <if test='param.teacherType.contains("MUSICIAN")'>
                    or t.musician_flag_ = 1
                </if>
                )
            </if>
            <if test="param.vipType != null">
                <if test="param.vipType.code == 'NORMAL'">
                    and vcr2.id_ is null
                </if>
                <if test="param.vipType.code != 'NORMAL'">
                    and vcr2.vip_type_ = #{param.vipType}
                </if>
            </if>
<!--            <if test="param.isVip != null">-->
<!--                <if test="param.isVip == 0">-->
<!--                    and (t.membership_end_time_ is null or t.membership_end_time_ &lt; now())-->
<!--                </if>-->
<!--                <if test="param.isVip == 1">-->
<!--                    and t.membership_end_time_ &gt;= now()-->
<!--                </if>-->
<!--            </if>-->
            <if test="param.tag != null">
                and find_in_set(#{param.tag},t.tag_)
            </if>
            <if test="null != param.lockFlag">
                and t.lock_flag_ = #{param.lockFlag}
            </if>
            <if test="null != param.delFlag">
                and u.del_flag_ = #{param.delFlag}
            </if>
            <if test="param.subjectId != null">
                and find_in_set(#{param.subjectId},t.subject_id_)
            </if>
            <if test="param.subjectIds != null and param.subjectIds.size() != 0">
                and (
                <foreach collection="param.subjectIds" item="subjectId" separator=" or " open="(" close=")">
                    find_in_set(#{subjectId},t.subject_id_)
                </foreach>
                )
            </if>
            <if test="param.isSettlement != null">
                and t.is_settlement_ = #{param.isSettlement}
            </if>
            <if test="param.isTestUser != null">
                and t.is_test_user_ = #{param.isTestUser}
            </if>
            <if test="null != param.vipEndTime">
                and vcr.end_time_ &lt;= #{param.vipEndTime}
            </if>
            <if test="null != param.vipStartTime">
                and vcr.end_time_ &gt;= #{param.vipStartTime}
            </if>
            <if test="param.trainFlag != null">
                AND t.train_time_ > 0
            </if>
            <if test="param.evaluateFlag != null">
                AND t.evaluate_time_ > 0
            </if>
            <if test="param.tenantId != null">
                AND t.tenant_id_ = #{param.tenantId}
            </if>
            <if test="param.bindTenant != null and param.bindTenant == 0">
                and t.tenant_id_ = -1
            </if>
            <if test="param.bindTenant != null and param.bindTenant == 1">
                and t.tenant_id_ != -1
            </if>
            <if test="param.settlementFrom != null">
                AND t.settlement_from_ = #{param.settlementFrom}
            </if>
            <if test="param.tenantName != null and param.tenantName.trim() != ''">
                and ti.name_ like concat('%',#{param.tenantName},'%')
            </if>
            <if test="param.customerService != null">
                AND t.customer_service_ = #{param.customerService}
            </if>
        </where>
        group by t.user_id_
        <if test="param.vipStartTime != null and param.vipEndTime != null">
<!--            having  ((vipEndTime >= #{param.vipStartTime} and #{param.vipEndTime}> vipEndTime) or (svipEndTime >= #{param.vipStartTime} and #{param.vipEndTime}> svipEndTime))-->
            having  currentVipEndTime >= #{param.vipStartTime} and #{param.vipEndTime}> currentVipEndTime
        </if>
        <choose>
            <when test="param.orderBy != null and param.orderBy.trim() != ''">
                order by ${param.orderBy}
            </when>
            <otherwise>
                order by t.create_time_ desc
            </otherwise>
        </choose>
    </select>

    <resultMap id="BasicUserInfo" type="com.yonge.cooleshow.biz.dal.dto.BasicUserInfo">
        <result property="userId" column="user_id_"/>
        <result property="username" column="username_"/>
        <result property="realName" column="real_name_"/>
        <result property="avatar" column="avatar_"/>
        <result property="phone" column="phone_"/>
        <result property="gender" column="gender_"/>
        <result property="birthdate" column="birthdate_"/>
    </resultMap>
    <select id="getBasicUserInfo" resultMap="BasicUserInfo">
        SELECT id_ user_id_, username_, real_name_, avatar_, phone_, gender_, birthdate_
        FROM sys_user
        WHERE del_flag_ = 0
          and id_ = #{userId}
        LIMIT 1
    </select>

    <select id="findBasicUserInfo" resultMap="BasicUserInfo">
        SELECT id_ user_id_,username_,real_name_,avatar_, phone_ FROM sys_user
        WHERE del_flag_ = 0 and id_ IN
        <foreach collection="studentIds" open="(" close=")" separator="," item="userId">
            #{userId}
        </foreach>
    </select>

    <select id="detail" resultType="com.yonge.cooleshow.biz.dal.vo.TeacherVo">
        SELECT
        <include refid="baseColumns"/>,
        if(u.lock_flag_ = 0 and t.lock_flag_ = 0,0,1) as lockFlag,
        u.avatar_ as avatar,
        u.username_ as username,
        u.gender_ as `gender`,
        u.birthdate_ as birthdate,
        u.phone_ as phone,
        (case when isnull(u.id_card_no_) then 0 else 1 end) as isReal,
        (!isnull(membership_end_time_) and membership_end_time_ > now()) as isVip,
        u.real_name_ as realName,
        u.id_card_no_ as idCardNo,
        if(vcr.type_ = 'PERMANENT',null,vcr.end_time_) as membershipEndTime,
        (case when isnull(b.user_id_) then 0 else 1 end) as isBank,
        (
        SELECT GROUP_CONCAT(name_ ORDER by locate(id_,t.subject_id_)) FROM subject WHERE FIND_IN_SET(id_,t.subject_id_)
        ) as subjectName,
        u.user_type_ as userType
        FROM teacher t
        left join sys_user u on t.user_id_ = u.id_
        left join (
        select distinct user_id_ from user_bank_card where del_flag_ = 0 and user_id_ = #{userId}
        ) b on t.user_id_ = b.user_id_
        left join vip_card_record vcr on t.user_id_ = vcr.user_id_ and vcr.client_type_ = 'TEACHER'
        and vcr.efficient_flag_ = 1 and vcr.end_time_ >= now() and now() > vcr.start_time_ and (vcr.vip_type_ = 'VIP' or vcr.vip_type_ = 'SVIP') and vcr.client_type_ = 'TEACHER'
        where t.user_id_ = #{userId}
    </select>

    <select id="querySubject" resultMap="com.yonge.cooleshow.biz.dal.dao.SubjectDao.Subject">
        SELECT s.*
        FROM `subject` s
                 LEFT JOIN teacher t ON FIND_IN_SET(s.id_, t.subject_id_)
        WHERE t.user_id_ = #{userId}
    </select>

    <update id="setSubject">
        update teacher
        set subject_id_  = #{subjectIds},
            update_time_ = now()
        where user_id_ = #{id}
    </update>

    <update id="addHomeBrowse">
        update teacher
        set browse_ = browse_ + 1
        where user_id_ = #{userId}
    </update>

    <select id="querySubjectItem" resultType="com.yonge.cooleshow.biz.dal.entity.Subject">
        select t.* from subject t
        join (
        select a.subject_id_ from (
        <trim prefixOverrides="union all">
            <if test="type == null or type =='MUSIC'">
                union all
                (select music_subject_ as subject_id_ from music_sheet where user_id_ = #{userId} GROUP BY
                music_subject_)
            </if>
            <if test="type == null or type =='VIDEO'">
                union all
                (select lesson_subject_ as subject_id_ from video_lesson_group where teacher_id_ = #{userId} GROUP BY
                lesson_subject_)
            </if>
            <if test="type == null or type =='PIANO_ROOM'">
                union all
                (select subject_id_ as subject_id_ from course_group where type_ = 'PIANO_ROOM_CLASS' and teacher_id_ =
                #{userId} GROUP BY subject_id_)
            </if>
            <if test="type == null or type =='PRACTICE'">
                union all
                (select subject_id_ as subject_id_ from course_group where type_ = 'PRACTICE' and teacher_id_ =
                #{userId} GROUP BY subject_id_)
            </if>
            <if test="type == null or type =='VIP'">
                union all
                (select subject_id_ as subject_id_ from course_group where type_ = 'VIP' and teacher_id_ =
                #{userId} GROUP BY subject_id_)
            </if>
            <if test="type == null or type =='GROUP'">
                union all
                (select subject_id_ as subject_id_ from course_group where type_ = 'GROUP' and teacher_id_ =
                #{userId} GROUP BY subject_id_)
            </if>
            <if test="type == null or type =='LIVE'">
                union all
                (select subject_id_ as subject_id_ from course_group where type_ = 'LIVE' and teacher_id_ = #{userId}
                GROUP BY subject_id_)
            </if>
        </trim>
        ) a group by a.subject_id_
        ) a on t.id_ = a.subject_id_
        where t.parent_subject_id_ != 0
        and not exists(
        select 1 from teacher s where s.user_id_ = #{userId} and find_in_set(t.id_,s.subject_id_)
        )
    </select>

    <select id="queryMyFans" resultType="com.yonge.cooleshow.biz.dal.vo.MyFens">
        SELECT
        s.student_id_ AS userId,
        s.create_time_ AS starTime,
        u.avatar_ AS avatar,
        u.username_ AS userName,
        u.real_name_ AS realName,
        u.gender_ AS gender,
        u.phone_ AS phone,
        u.birthdate_ AS birthdate,
        (SELECT group_concat(name_) FROM `subject` WHERE find_in_set(id_,sr.subject_id_)) AS subjectName
<!--        if(sr.membership_start_time_ &lt;= now() and sr.membership_end_time_ &gt;= now(),1,0) AS isVip-->
        FROM student_star s
        LEFT JOIN sys_user u ON s.student_id_ = u.id_
        LEFT JOIN student sr ON s.student_id_ = sr.user_id_
        <where>
<!--            u.del_flag_ = 0-->
            <if test="record.teacherId != null">
                AND s.teacher_id_ =#{record.teacherId}
            </if>
            <if test="record.nickname != null">
                AND u.username_ LIKE '%${record.nickname}%'
            </if>
            <if test="record.userId != null">
                AND u.id_ = #{record.userId}
            </if>
            <if test="record.phone != null">
                AND u.phone_ = #{record.phone}
            </if>
            <if test="record.startTime != null and record.endTime != null">
                AND ( #{record.startTime} &lt;= s.create_time_ AND s.create_time_ &lt;= #{record.endTime})
            </if>
        </where>
    </select>

    <select id="queryHotTeacherList" resultMap="HotTeacherVoMap">
        select t.user_id_, t.graduate_school_, u.username_, u.avatar_, ifnull(a.speaker_id_, 0) isLiving_,tt.fans_num_ fansNum
        from teacher t
                 left join sys_user u on t.user_id_ = u.id_
                 left join teacher_total tt on tt.user_id_ = t.user_id_
                 left join (SELECT lr.speaker_id_
                            from live_room lr
                            WHERE live_state_ = 1 and type_ = 'temp'
                            group by lr.speaker_id_) a on a.speaker_id_ = t.user_id_
                 left join (select tft.teacher_id_,COUNT(DISTINCT tsp.course_type_) num from teacher_free_time tft
                                                                                                 left join teacher_subject_price tsp ON tsp.teacher_id_ = tft.teacher_id_
                            group by tft.teacher_id_) tft ON tft.teacher_id_ = t.user_id_
                 left join (select create_by_,COUNT(DISTINCT create_by_) num from music_sheet where del_flag_ = 0 AND state_ = 1 AND source_type_ = 'TEACHER'
                            GROUP BY create_by_) ms ON ms.create_by_ = t.user_id_
        where t.entry_flag_ = 1
          and t.is_test_user_ = 0 AND t.lock_flag_ = 0
          and find_in_set(#{subjectId}, t.subject_id_)
        order by tft.num desc ,ms.num DESC ,tt.fans_num_ desc,t.user_id_
        limit 10
    </select>

    <!--老师学生人数统计-->
    <select id="selectTeacherStudentNumberStatInfo"
            resultType="com.yonge.cooleshow.biz.dal.wrapper.StatGroupWrapper">
        SELECT t1.teacher_id_ AS id, COUNT(DISTINCT t1.id_) AS total FROM user_binding_teacher t1
        <where>
            <if test="teacherIds != null">
                AND t1.teacher_id_ IN (<foreach collection="teacherIds" separator="," item="item">
                #{item}
            </foreach>)
            </if>
        </where>
        GROUP BY t1.teacher_id_
    </select>

    <select id="countTeacherByTenantIds" resultType="com.yonge.cooleshow.biz.dal.wrapper.TenantInfoWrapper$UserCount">
        select tenant_id_ tenantId, count(tenant_id_) count
        from teacher
        <where>
            lock_flag_ = 0
            <if test="tenantIdList != null">
                AND tenant_id_ in
                <foreach collection="tenantIdList" item="item" separator="," open="(" close=")">
                    #{item}
                </foreach>
            </if>
        </where>

        group by tenant_id_
    </select>
    <select id="queryTeacherCounts" resultType="java.lang.Integer">
        select count(tenant_id_)
        from teacher
        <where>
             lock_flag_ = 0
            <if test="id != null">
              and tenant_id_ = #{id}
            </if>
        </where>
    </select>
    <!--老师学生人数统计-->

    <select id="getCustomerServiceByFriendLeast" resultMap="BaseResultMap">
        select
        t.*
        from
        ( SELECT
        te.user_id_,
        count(iuf.friend_id_) friends
        from teacher te
        left join sys_user su on te.user_id_ = su.id_
        left join im_user_friend iuf on te.user_id_ = iuf.user_id_ and iuf.source_form_='CUSTOMER'
        where te.lock_flag_ = 0 and te.customer_service_ = 1 and su.del_flag_ = 0 and su.lock_flag_ = 0
        group by te.user_id_
        order by friends
        limit 1) m
        left join teacher t on m.user_id_ = t.user_id_
    </select>

    <select id="getCustomerServiceFriendNums" resultType="com.yonge.cooleshow.biz.dal.wrapper.teacher.TeacherWrapper$TeacherFriend">
        SELECT te.user_id_       teacherId,
               count(k.user_id_) friendNums
        from teacher te
                 left join sys_user su on te.user_id_ = su.id_
                 left join (select s.user_id_, s.customer_id_
                            from student s
                            where s.customer_id_ is not null
                            union all
                            select te.user_id_, te.customer_id_
                            from teacher te
                            where te.customer_service_ = 0 and te.customer_id_ is not null) k on te.user_id_ = k.customer_id_
        where te.lock_flag_ = 0
          and te.customer_service_ = 1
          and su.del_flag_ = 0
          and su.lock_flag_ = 0
        group by te.user_id_
        order by friendNums
    </select>

    <!--系统客服列表-->
    <select id="selectCustomerServiceV2" resultType="com.yonge.cooleshow.biz.dal.entity.Teacher">
        SELECT t.im_customer_id_ AS imCustomerId FROM (
          SELECT CONCAT(t1.user_id_, '_TEACHER') AS im_customer_id_ FROM teacher t1 LEFT JOIN sys_user t2 ON t1.user_id_ = t2.id_ WHERE t1.customer_service_ = 1 AND t1.lock_flag_ = 0  AND t2.lock_flag_ = 0
          UNION ALL
          SELECT CONCAT(t1.user_id_, '_SYSTEM') AS im_customer_id_ FROM employee t1 LEFT JOIN sys_user t2 ON t1.user_id_ = t2.id_ WHERE t1.customer_service_ = 1 AND t1.lock_flag_ = 0 AND t2.lock_flag_ = 0
        ) t
    </select>

    <!--系统客服好友统计-->
    <select id="countCustomerServiceMemberNum"
            resultType="com.yonge.cooleshow.biz.dal.wrapper.StatGroupWrapper">
        SELECT t.im_customer_id_ AS gid, COUNT(t.user_id_) AS total FROM (
             SELECT t1.im_customer_id_, t1.user_id_ FROM teacher t1 WHERE t1.im_customer_id_ != '' AND t1.customer_service_ = 0
             UNION ALL
             SELECT t1.im_customer_id_, t1.user_id_ FROM student t1 WHERE t1.im_customer_id_ != ''
         ) t GROUP BY t.im_customer_id_
    </select>
    <select id="getStudentIds" resultType="java.lang.Long">
        select distinct cssp.user_id_ from course_group cg
        left join course_schedule_student_payment cssp ON cssp.course_group_id_ = cg.id_
        <if test="startTime != null and startTime != ''">
            left join course_schedule cs ON cssp.course_id_ = cs.id_
        </if>
        <if test="subjectId != null">
            left join student st ON st.user_id_ = cssp.user_id_
        </if>
        where cg.status_ = 'ING' AND cg.teacher_id_ = #{teacherId}
        <if test="startTime != null and startTime != ''">
            AND cs.class_date_ BETWEEN #{startTime} AND #{endTime}
        </if>
        <if test="subjectId != null">
            and find_in_set(#{subjectId},st.subject_id_)
        </if>
        union
        select distinct st.user_id_ from tenant_group tg
        left join student st ON st.tenant_group_id_ = tg.id_
        where tg.admin_id_ = #{teacherId}
        <if test="subjectId != null">
            and find_in_set(#{subjectId},st.subject_id_)
        </if>
    </select>

</mapper>