backend_dormitory/src/main/resources/mapper/template/WelcomeStudentMapper.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.WelcomeStudentMapper">
    <resultMap type="com.template.model.vo.StudentPageVo" id="studentPageMap">
        <result property="id" column="id"/>
        <result property="admissNum" column="admiss_num"/>
        <result property="name" column="name"/>
        <result property="cardId" column="card_id"/>
        <result property="college" column="college"/>
        <result property="major" column="major"/>
        <result property="classstr" column="classstr"/>
        <result property="trafficMethod" column="traffic_method"/>
        <result property="arrive" column="arrive"/>
        <result property="amountPayable" column="amount_payable"/>
        <result property="payAmount" column="pay_amount"/>
        <result property="dormitory" column="dormitory"/>
        <result property="accompanyNum" column="accompanyNum"/>
    </resultMap>

    <select id="queryStudentPageList" resultType="com.template.model.vo.StudentPageVo" resultMap="studentPageMap">
        select (select count(id) from welcome_accompany where student_card = ws.card_id) as accompanyNum,
        ws.id,ws.admiss_num,ws.name,ws.card_id,ws.college,ws.major,ws.classstr,
        ws.traffic_method,ws.arrive,ws.amount_payable,ws.pay_amount,
        CONCAT(wsd.building, '-', wsd.dormitory, '-', wsd.bed_num) as dormitory
        from welcome_student ws
        left join welcome_student_dormitory wsd on wsd.deleted =0 and wsd.student_card = ws.card_id
        where ws.deleted = 0
        <if test="collegeId != null and collegeId != ''">
            ws.college_id = #{collegeId}
        </if>
        <if test="majorId != null and majorId != ''">
            ws.major_id = #{majorId}
        </if>
        <if test="classstrId != null and classstrId != ''">
            ws.classstr_id = #{classstrId}
        </if>
        <if test="trafficMethod != null and trafficMethod != ''">
            ws.trafficMethod = #{trafficMethod}
        </if>
        <if test="name != null and name != ''">
            ws.name like '%' #{name} '%'
        </if>
        order by ws.update_time desc
    </select>
    <select id="studentRegister" resultType="com.template.model.vo.StudentRegisterVo">
        SELECT count(ws.id) AS count,
	           wo.`name` AS collegeName
        FROM
            `welcome_student` ws
            LEFT JOIN welcome_org wo
        ON ws.college_id = wo.id AND wo.deleted = 0
        WHERE
            ws.deleted = 0
            AND ws.iden_type=1
        GROUP BY
            college_id
    </select>
    <select id="studentTraffic" resultType="com.template.model.vo.StudentTrafficVo">
        SELECT count(ws.id) AS count,
	        ws.traffic_method as trafficMethod
        FROM
            `welcome_student` ws
        WHERE
            ws.deleted = 0
          AND ws.iden_type=1
        GROUP BY
            traffic_method
    </select>
    <select id="studentSexRatio" resultType="com.template.model.vo.StudentSexRatioVo">
        SELECT wo.`name` as collegeName,
               new.count  AS manCount,
               new2.count AS girlCount
        FROM `welcome_student` w
                 LEFT JOIN (SELECT ws.college_id AS collegeId,
                                   count(ws.id) AS count
                            FROM
                                `welcome_student` ws
                            WHERE
                                ws.deleted = 0
                              AND ws.sex = '男'
                              AND ws.iden_type=1
                            GROUP BY
                                college_id) new ON w.college_id = new.collegeId
                 LEFT JOIN (SELECT ws.college_id AS collegeId,
                                   count(ws.id) AS count
                            FROM
                                `welcome_student` ws
                            WHERE
                                ws.deleted = 0
                              AND ws.sex = '女'
                              AND ws.iden_type=1
                            GROUP BY
                                college_id) new2 ON w.college_id = new2.collegeId
                 LEFT JOIN welcome_org wo ON w.college_id = wo.id
            AND wo.deleted = 0
        GROUP BY w.college_id
    </select>
</mapper>