shz-backend/ruoyi-bussiness/src/main/resources/mapper/app/FairStatisticsMapper.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.ruoyi.cms.mapper.FairStatisticsMapper">

    <!--
      线上招聘会：
      - 只统计招聘会类型为“1-线上”的有效公共招聘会；
      - 参会单位为审核通过的企业；
      - 职位、需求人数、投递岗位均限定为有效招聘会岗位；
      - vacancies 为空或非正数时按“若干”口径计为 1 人。
    -->
    <select id="selectOnlineFairStatistics" resultType="com.ruoyi.cms.domain.vo.FairStatisticsFairItem">
        SELECT
            f.job_fair_id AS "fairId",
            f.job_fair_title AS "fairTitle",
            f.job_fair_start_time AS "startTime",
            COALESCE((
                SELECT COUNT(DISTINCT company_relation.company_id)
                FROM public_job_fair_company company_relation
                WHERE company_relation.job_fair_id = f.job_fair_id
                  AND company_relation.del_flag = '0'
                  AND COALESCE(company_relation.review_status, '1') = '1'
            ), 0) AS "companyCount",
            COALESCE((
                SELECT COUNT(DISTINCT fair_job.job_id)
                FROM public_job_fair_job fair_job
                INNER JOIN job job_info ON job_info.job_id = fair_job.job_id
                                      AND job_info.del_flag = '0'
                WHERE fair_job.job_fair_id = f.job_fair_id
                  AND fair_job.del_flag = '0'
                  AND EXISTS (
                      SELECT 1
                      FROM public_job_fair_company company_relation
                      WHERE company_relation.job_fair_id = fair_job.job_fair_id
                        AND company_relation.company_id = fair_job.company_id
                        AND company_relation.del_flag = '0'
                        AND COALESCE(company_relation.review_status, '1') = '1'
                  )
            ), 0) AS "jobCount",
            COALESCE((
                SELECT SUM(CASE WHEN job_info.vacancies IS NULL OR job_info.vacancies &lt;= 0 THEN 1 ELSE job_info.vacancies END)
                FROM (
                    SELECT DISTINCT fair_job.job_id
                    FROM public_job_fair_job fair_job
                    WHERE fair_job.job_fair_id = f.job_fair_id
                      AND fair_job.del_flag = '0'
                      AND EXISTS (
                          SELECT 1
                          FROM public_job_fair_company company_relation
                          WHERE company_relation.job_fair_id = fair_job.job_fair_id
                            AND company_relation.company_id = fair_job.company_id
                            AND company_relation.del_flag = '0'
                            AND COALESCE(company_relation.review_status, '1') = '1'
                      )
                ) fair_job
                INNER JOIN job job_info ON job_info.job_id = fair_job.job_id
                                      AND job_info.del_flag = '0'
            ), 0) AS "demandCount",
            COALESCE((
                SELECT COUNT(DISTINCT fair_job.job_id)
                FROM public_job_fair_job fair_job
                INNER JOIN job job_info ON job_info.job_id = fair_job.job_id
                                      AND job_info.del_flag = '0'
                INNER JOIN job_apply apply_record ON apply_record.job_id = fair_job.job_id
                                                  AND apply_record.del_flag = '0'
                WHERE fair_job.job_fair_id = f.job_fair_id
                  AND fair_job.del_flag = '0'
                  AND EXISTS (
                      SELECT 1
                      FROM public_job_fair_company company_relation
                      WHERE company_relation.job_fair_id = fair_job.job_fair_id
                        AND company_relation.company_id = fair_job.company_id
                        AND company_relation.del_flag = '0'
                        AND COALESCE(company_relation.review_status, '1') = '1'
                  )
            ), 0) AS "interactionCount"
        FROM public_job_fair f
        WHERE f.del_flag = '0'
          AND f.job_fair_type = '1'
          <choose>
              <when test="fairId != null and fairId != ''">
                  AND f.job_fair_id = #{fairId}
              </when>
              <otherwise>
                  AND f.job_fair_start_time <![CDATA[ >= ]]> #{startTime}
                  AND f.job_fair_start_time <![CDATA[ < ]]> #{endTime}
              </otherwise>
          </choose>
        ORDER BY f.job_fair_start_time DESC NULLS LAST, f.job_fair_id DESC
    </select>

    <!--
      户外招聘会没有投递入口，因此 interactionCount 只汇总签到人员记录。
      户外岗位也使用 job.vacancies；为空或非正数时按“若干=1 人”处理。
    -->
    <select id="selectOutdoorFairStatistics" resultType="com.ruoyi.cms.domain.vo.FairStatisticsFairItem">
        SELECT
            CAST(f.id AS VARCHAR) AS "fairId",
            f.title AS "fairTitle",
            f.hold_time AS "startTime",
            COALESCE((
                SELECT COUNT(DISTINCT company_relation.company_id)
                FROM fair_company company_relation
                WHERE company_relation.job_fair_id = f.id
                  AND COALESCE(company_relation.del_flag, '0') = '0'
            ), 0) AS "companyCount",
            COALESCE((
                SELECT COUNT(DISTINCT fair_job.job_id)
                FROM cms_outdoor_fair_job fair_job
                INNER JOIN job job_info ON job_info.job_id = fair_job.job_id
                                      AND job_info.del_flag = '0'
                WHERE fair_job.fair_id = f.id
                  AND COALESCE(fair_job.del_flag, '0') = '0'
            ), 0) AS "jobCount",
            COALESCE((
                SELECT SUM(CASE WHEN job_info.vacancies IS NULL OR job_info.vacancies &lt;= 0 THEN 1 ELSE job_info.vacancies END)
                FROM (
                    SELECT DISTINCT fair_job.job_id
                    FROM cms_outdoor_fair_job fair_job
                    WHERE fair_job.fair_id = f.id
                      AND COALESCE(fair_job.del_flag, '0') = '0'
                ) fair_job
                INNER JOIN job job_info ON job_info.job_id = fair_job.job_id
                                      AND job_info.del_flag = '0'
            ), 0) AS "demandCount",
            COALESCE((
                SELECT COUNT(1)
                FROM cms_outdoor_fair_attendee attendee
                WHERE attendee.fair_id = f.id
                  AND COALESCE(attendee.del_flag, '0') = '0'
            ), 0) AS "interactionCount"
        FROM cms_outdoor_fair f
        WHERE COALESCE(f.del_flag, '0') = '0'
          <choose>
              <when test="fairId != null">
                  AND f.id = #{fairId}
              </when>
              <otherwise>
                  AND f.hold_time <![CDATA[ >= ]]> #{startTime}
                  AND f.hold_time <![CDATA[ < ]]> #{endTime}
              </otherwise>
          </choose>
        ORDER BY f.hold_time DESC NULLS LAST, f.id DESC
    </select>
</mapper>