多重條件組合查詢(一)
平常我們在開發系統時,一定不會缺少查詢弁?然而往往算個條件是無法滿足用戶的要求的,這時我們就應該設置多重條件進行組合,讓用戶查詢時以更加方便地選擇查詢條件,迅速找到他們所滿足的記錄.
現在我們假設開發一個鐘表公司的客戶訂單系統,有客戶訂單編號,類別,名稱,數量,价格等資料,這里就不將資料一一列擊,.訂單表如下:
訂單編號(ID) 類別(TYPE)名稱(NAME)數量(QTY) 价格(PRICE)
001 机芯 机芯1 100 150
001 表殼 表殼1 1000 60
001 表帶 表帶1 500 70
002 机芯 机芯2 200 40
002 表殼 表殼2 300 53
002表帶 表帶2 400 46
現在我們設想要建一個查詢系統,讓用戶即可根据訂單編號,也可根据類別,或者根据价格,或者其中的各自組合來實現快速查詢,代號如下:
下面此部分是顯示查詢條件的窗体
$linkstr=mysql_connect("localhost","root","sa");
mysql_select_db("cx",$linkstr);
?>

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