在我的表courses
中,我有几个条目共享相同的值。我正在使用foreach循环来检索具有相同的所有行。在下面的例子中,有一个学院有两门课程。这些值显示正确,但显示了一些不必要的值。例如,它创建了两个结果。是否有可能在wanted result to display
部分有如下所示的组合结果?对于每个循环显示来自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 |
+----+------------+----------------------+---------------+------------+
当前结果显示
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
诚征Result-联合
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
您显示查询结果集中不存在的列'$ value ['name']'和'$ value ['type'] for academy name/type。您目前如何让显示屏实际按照您所显示的方式工作?其次,如果你一次只查询一个学院,为什么要输出循环内的学院信息呢?只需将循环学院信息显示在循环之外,并将特定于班级的内容留在循环中即可解决问题。 –
@MarkBryant好点。它如何看起来像循环外的学院信息?我的头脑无法把握这个概念 –