mysql子查询

mysql子查询 where型子查询 把内层查询结果看成外层查询的比较条件mysql -- 不用order by 来查询最新的商品 -- 取出每一个栏目下最新的产品(goods_id惟一) select cat_id, goods_id,goods_name from goods where goods_id in(select max(goods_id) from goods group b

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