join
--cross join select * from salesTbl cross join goodsTbl --inner join select * from salesTbl, goodsTbl where salesTbl.goodsId = goodsTbl.goodsId select * from salesTbl inner join goodsTbl ON salesTbl.goodsId = goodsTbl.goodsId --고객이 언제 어떤 상품을 얼만큼 사갔다 select custId, saleDate, salesTbl.goodsId, goodsName, sales from salesTbl, goodsTbl select custId, saleDate, salesTbl.goodsId, goodsName, sales from..