$result=mysql_query("select * from shop_goods where goods_name='{$_POST['goods_name']}'"); if (mysql_num_rows($result)>0){ echo "history.go(-1); alert('商品名稱已存在')";
這只是新增時單純判斷goods_name裡有沒有重複的名稱
那如果要增加條件 例如: 在台灣(goods_country) and 台北縣(goods_area) 下有沒有重複的goods_name名稱 我因該要怎麼寫才好呢?
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