SQL写一个临时表，去更新这个表里的字段

create table temp_should_display_brand as select distinct b.x_brand_id,i.imgname,s.store_id from x_brand b,x_brand_st_img i,x_brand_store s where b.x_brand_id = i.x_brand_id and b.x_brand_id = s.x_bra

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