在我的表courses
中,我有幾個條目共享相同的值。我正在使用foreach循環來檢索具有相同的所有行。在下面的例子中,有一個學院有兩門課程。這些值顯示正確,但顯示了一些不必要的值。例如,它創建了兩個結果。是否有可能在wanted result to display
部分有如下所示的組合結果?對於每個循環顯示來自mysql表的值
PHP
$academy_id = 123
$db_select = $db_con->prepare("
SELECT ca.course_name,
ca.course_start_date,
ca.course_end_date
FROM courses_by_academy ca
WHERE ca.academy_id = :academy_id
");
$final_result = '';
if (!$db_select) return false;
if (!$db_select->execute(array(':academy_id' => $academy_id))) return false;
$results = $db_select->fetchAll(\PDO::FETCH_ASSOC);
if (empty($results)) return false;
foreach ($results as $value){
$final_result .= "<b>Academy Name: </b>".$value['name']."</br><b>Academy Type: </b>".$value['type']."</br><b>Status: </b>".$value['status']."</br>";
$final_result .= "<b>Course Name: </b>".$value['course_name']."</br><b>Start Date: </b>".$value['course_start_date']."</br><b>End Date: </b>".$value['course_end_date']."</br>";
}
}
表值
+----+------------+----------------------+---------------+------------+
| id | academy_id | course_name | start_date | end_date |
+----+------------+----------------------+---------------+------------+
| 1 | 123 | Biology - Basic | 2013-11-30 | 2013-12-25 |
| 2 | 123 | Biology - Nutrition | 2014-01-15 | 2014-01-25 |
+----+------------+----------------------+---------------+------------+
當前結果顯示
Academy Name: North Valley Schools
Academy Type: Post-Secondary
Status: INACTIVE
ID: 123
Course Name: Biology - Basic
Start date: 2013-11-30
End date: 2013-12-25
Academy Name: North Valley Schools
Academy Type: Post-Secondary
Status: INACTIVE
ID: 123
Course Name: Biology - Nutrition
Start date: 2014-01-15
End date: 2014-01
誠徵Result-聯合
Academy Name: North Valley Schools
Academy Type: Post-Secondary
Status: INACTIVE
ID: 123
Course Name: Biology - Basic
Start date: 2013-11-30
End date: 2013-12-25
Course Name: Biology - Nutrition
Start date: 2014-01-15
End date: 2014-01-25
您顯示查詢結果集中不存在的列'$ value ['name']'和'$ value ['type'] for academy name/type。您目前如何讓顯示屏實際按照您所顯示的方式工作?其次,如果你一次只查詢一個學院,爲什麼要輸出循環內的學院信息呢?只需將循環學院信息顯示在循環之外,並將特定於班級的內容留在循環中即可解決問題。 –
@MarkBryant好點。它如何看起來像循環外的學院信息?我的頭腦無法把握這個概念 –