sql查询的结果，其他字段相同，就一个不同，合并后不同的字段数值拼接

SELECT
r.report_org_code AS orgCode,
r.report_org_type AS orgType,
r.report_org_name AS orgName,
r.report_quarter AS reportQuarter,
r.report_year AS reportYear,
r.report_time AS reportDate,
rtt.related_name AS relatedNames,
rt.product_name AS productName,
rt.product_scale AS productScale,
rt.product_ratio AS productRatio,
rt.shareholder_flag AS shareholderFlag,
GROUP_CONCAT(DISTINCT rtt.related_name
ORDER BY rtt.related_name ASC
SEPARATOR '、')

FROM
(
SELECT
*
FROM
t_multi_hi_related_trans
WHERE
report_id = 3
AND trans_type = '1'
AND credit_type = '04'
AND is_deleted = 'N'
AND history_id = (
SELECT
max( history_id )
FROM
t_multi_hi_related_trans
WHERE
report_id = 3)
) rt
LEFT JOIN t_multi_hi_related_trans_tgt rtt ON rtt.trans_num = rt.trans_num
AND rtt.history_id = rt.history_id
AND rtt.is_deleted = 'N'
LEFT JOIN t_multi_report r ON r.pid = rt.report_id
GROUP BY rt.pid

关键在于这个

GROUP_CONCAT(DISTINCT rtt.related_name
ORDER BY rtt.related_name ASC
SEPARATOR '、')

效果展示