SELECT goods_id,goods_name,goods_price FROM tdb_goods
WHERE goods_price = ALL (SELECT goods_price FROM tdb_goods
WHERE goods_cate='超级本')；
SELECT goods_id,goods_name,goods_price FROM tdb_goods
WHERE goods_price <> ALL (SELECT goods_price FROM tdb_goods
WHERE goods_cate='超级本');
你们说看不清的代码
