以下sql 修改为如果item_price没有对应数据时gold_price更新为0 update box_draw_record set gold_price = select gold from diamonditem_price where item_id = box_draw_recorditem_id where gold_price = 0
update box_draw_record set gold_price = coalesce((select gold from diamond.item_price where item_id = box_draw_record.item_id), 0) where gold_price = 0
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