card_exhibitor 是展商表
card_card 是名片表
展商表 裏之前staff_card 字段存儲的是員工的card id,用逗號分隔。
後來考慮到 員工card 會很多,所以設計了中間表card_exhibitor_staff_r
將逗號分隔的數據查出來導入到 中間表
sql 如下,備註下,方便以後寫類似語句。
INSERT INTO card.card_exhibitor_staff_r
(id, staff_card_id, exhibitor_id, create_time)
select uuid_short(),cc.id as cardId,ce.id,ce.create_time
from card_exhibitor ce
left join card_card cc on find_in_set(cc.id,ce.staff_card)
where staff_card != ''
and cc.id is not null;