mysql 逗號分隔查詢

商品表 goods 有學校字段 school_ids

學校字段 school_ids 中保存學校表 school 的id，如果商品包含多個學校則多個id使用逗號分隔保存

goods:

school:

查詢SQL:

select g.id,g.school_ids,GROUP_CONCAT(s.locality_name) from goods g left join school s on FIND_IN_SET(s.id , g.school_ids)
GROUP BY g.id
ORDER BY g.id ASC

結果：