php - 如何用Mysql和Php从这三个表为学生生成成绩单

Question

我有三个链接在一起的表。我想做的是为类(class)中的所有学生生成一份成绩单。

表格students_info

name      sex age students_ID
--------- --- --- -----------
Kinsley   M    12           1
Michael   m    12           2
Rhianna   f    22           3

表格scores_panel

1stCA 2ndCA exam students_ID subjectID
----- ----- ---- ----------- ---------
   23    15   42           1         1
   10    12    7           1         2
   43    15   62           1         3
   10    12   27           2         1
   10    12   57           2         2
   23    15   12           2         3
   11    12   27           3         1
   04    12   57           3         2
   13    25   12           3         3

表格主题

subjectname subjectID
----------- ---------
english             1
maths               2
biology             3

我希望我的结果如下所示:

NAME KINSLEY
SEX M
AGE 12

下面是成绩单

subject   1stCA 2ndCA EXAM
--------- ----- ----- ----
english      23    15   42
maths        10    12    7
Biology      43    15   62

...对于所有学生等等

仅检索一个科目和分数，而不是全部

<?php
include("connect.php");

$generate="SELECT students_info.name, subject.subjectname, scores_panel.1stCA, scores_panel.2ndCA, scores_panel.EXAM
FROM
students_info
LEFT JOIN
scores_panel
ON students_info.students_ID=scores_panel.students_ID
LEFT JOIN
subject
ON
subject.subjectID=scores_panel.subjectID
GROUP BY scores_panel.subjectID  ";

$fetch=mysql_query($generate);
while($row=mysql_fetch_array($fetch)or die(mysql_error()))
{
?>
**NAME:** 
<?PHP echo $row['name']; ?>
subject 1stCA 2ndCA EXAM
----------
<?PHP echo $row['subjectname']; ?>
<?PHP echo $row['1stCA']; ?>     
<?PHP echo $row['2ndCA']; ?>   
<?PHP echo $row['EXAM']; ?>

THIS IS YOUR REPORT CARD 
<?PHP } ?>

它有效，但只为每个学生显示一门科目，

示例

  NAME Rhianna 
    SEX F
    AGE 22

下面是成绩单

subject   1stCA 2ndCA EXAM
--------- ----- ----- ----
english      11    12   27

姓名金斯利 性别男 12岁

下面是成绩单

subject   1stCA 2ndCA EXAM
--------- ----- ----- ----
english      23    15   42

而不是这样的:

  NAME KINSLEY
    SEX M
    AGE 12

下面是成绩单

subject   1stCA 2ndCA EXAM
--------- ----- ----- ----
english      23    15   42
maths        10    12    7
Biology      43    15   62


  NAME Rhianna 
    SEX F
    AGE 22

下面是成绩单

subject   1stCA 2ndCA EXAM
--------- ----- ----- ----
english      11    12   27
maths        04    12    57
Biology      13    25   12

...对于所有学生等等。

我们将不胜感激您的帮助

谢谢

Answer 1

你们离得很近。刚刚在 group by 子句中错过了 student_info.students ID

SELECT students_info.name, subject.subjectname, scores_panel.1stCA, scores_panel.2ndCA, scores_panel.EXAM
FROM
students_info
LEFT JOIN
scores_panel
ON students_info.students_ID=scores_panel.students_ID
LEFT JOIN
subject
ON
subject.subjectID=scores_panel.subjectID
GROUP BY students_info.students_ID,scores_panel.subjectID

FIDDLE