如何將具有多個公共字段的兩個表連接到搜索過濾器

Question

我有2個表bpi_registration和bpi_teamProfile。 bpi_registration中的字段是： id, id_school, first_name,last_name,email,city,state,country和bpi_teamProfile表中的字段是id_team, team_name, id_student1, id_student2, id_student3 now id_student1，id_student2，id_student3包含相同的學生id在bpi_registration中。 我不知道如何連接多個字段。 我寫的查詢如下。 如果我錯了，請糾正我：

SELECT * FROM bpi_registration
            INNER JOIN bpi_teamProfile
            ON bpi_registration.id=bpi_teamProfile.id_student1
            AND bpi_registration.id=bpi_teamProfile.id_student2
            AND bpi_registration.id=bpi_teamProfile.id_student3
            AND bpi_registration.id=bpi_teamProfile.id_student4
            AND bpi_registration.id=bpi_teamProfile.id_student5

我正在嘗試以這樣一種方式實現搜索過濾器：當有人點擊團隊下拉列表時firstname,lastname,email,city,state,country bpi_registration的firstname,lastname,email,city,state,country bpi_registration顯示出來。 下面是我的PHP代碼

 if (isset($_GET['Team'])) { $sql="SELECT * FROM bpi_registration INNER JOIN bpi_teamProfile ON bpi_registration.id=bpi_teamProfile.id_student1 AND bpi_registration.id=bpi_teamProfile.id_student2 AND bpi_registration.id=bpi_teamProfile.id_student3 AND bpi_registration.id=bpi_teamProfile.id_student4 AND bpi_registration.id=bpi_teamProfile.id_student5" $userQuery = "{$sql} WHERE bpi_teamProfile.team_name = :team_id"; $user = $db->prepare($userQuery); $user->execute(['team_id' => $_GET['Team']]); $selectedUser=$user->fetch(PDO::FETCH_ASSOC); if(isset($selectedUser)) { echo '<tr>'; echo '<td>' . $selectedUser['first_name'] . '</td>'; echo '<td>' . $selectedUser['last_name'] . '</td>'; echo '<td>' . $selectedUser['email'] . '</td>'; echo '<td>' . $selectedUser['address_city'] . '</td>'; echo '<td>' . $selectedUser['address_state'] . '</td>'; echo '<td>' . $selectedUser['address_country'] . '</td>'; echo '</tr>'; } } 

當我們點擊團隊過濾器時，網址看起來像這樣 - https://www.example.com/retrieve1.php?Grade=&School=&Team=mary+winners&Students=

但是我無法獲得理想的結果。

Answer 1

似乎不太可能學生在給定行中的id列都映射回相同的id（在注冊中）......或者查詢將正確返回。 如果它們不同，是否要加入'OR'？

SELECT * FROM bpi_registration
            INNER JOIN bpi_teamProfile
            ON (bpi_registration.id=bpi_teamProfile.id_student1)
            OR (bpi_registration.id=bpi_teamProfile.id_student2)
            OR (bpi_registration.id=bpi_teamProfile.id_student3)
            OR (bpi_registration.id=bpi_teamProfile.id_student4)
            OR (bpi_registration.id=bpi_teamProfile.id_student5)