php - 在php中不使用while循环查看所有表字段值

Question

使用while循环查看所有表字段值，但相同的值重复多次。

怎么解决...?? 请有人帮助我吗？

$tender_select_query ="SELECT * FROM new_tender_one,new_tender_two,new_tender_three,new_tender_four WHERE new_tender_one.id = new_tender_two.tender_id AND new_tender_one.id = new_tender_three.tender_id AND new_tender_one.id = new_tender_four.tender_id";
$tender_select_result =mysql_query($tender_select_query);
while($tender_row = mysql_fetch_assoc($tender_select_result)){
    $id =$tender_row['id'];
    $work_name =$tender_row['work_name'];
    $procuring_entity =$tender_row['procuring_entity'];
    $reference_no =$tender_row['reference_no'];
    $procurement_method =$tender_row['procurement_method'];
    $bid_eligibility =$tender_row['bid_eligibility'];
    $last_date =$tender_row['last_date'];
    $pre_tend_info =$tender_row['pre_tend_info'];
    $comp_work =$tender_row['comp_work'];
    $tend_security =$tender_row['tend_security'];
    $tend_instruction =$tender_row['tend_instruction'];
    $tend_invite =$tender_row['tend_invite'];
    $cont_details =$tender_row['cont_details'];
    $publish_date =$tender_row['publish_date'];
    $tender_status =$tender_row['tender_status'];

    $tender_id =$tender_row['tender_id'];
    $tender_type =$tender_row['tender_type'];
    $tender_type_subcat =$tender_row['tender_type_subcat'];

    $item_name =$tender_row['item_name'];
    $item_description =$tender_row['item_description'];
    $item_offer =$tender_row['item_offer'];
    $quantity =$tender_row['quantity'];
    $unit_type =$tender_row['unit_type'];

    $required_name =$tender_row['required_name'];                       

Answer 1

问题是query你用过。

如果你有同样的tender_id在new_tender_one或new_tender_two等等，你肯定会得到多行。

<强> new_tender_one

id  | tender_title
1   | tender_1
2   | tender_2

<强> new_tender_two

tender_id | tenderer_name
    1     |  smith
    1     |  john
    2     |  paul

<强> result

id  | tender_title | tender_id | tenderer_name
1   | tender_1     |     1     |  smith
1   | tender_1     |     1     |  john
2   | tender_2     |     2     |  paul

确保没有重复 tender_id表中的 s new_tender_two , new_tender_three , new_tender_four .

如果有，则必须使用子查询。那么你需要知道是哪个record您需要其他 tables 。 (例如:对于 id 1 是否 smith 或 john )。