Php 从mysql表中检索所有行,但首先将它们分组以删除重复
我正在从一个表中检索所有记录,以便在php页面上回显它们,问题是表中重复的3列中有具有类似值的行,请有人帮助我编写这段代码,我需要对哪些行进行分组?该组仅检索到一行,请务必回复。按分组的字段将重复,添加新记录的字段为secondarySubject和secondaryGrade 我得到的结果是:Php 从mysql表中检索所有行,但首先将它们分组以删除重复,php,mysql,sql,Php,Mysql,Sql,我正在从一个表中检索所有记录,以便在php页面上回显它们,问题是表中重复的3列中有具有类似值的行,请有人帮助我编写这段代码,我需要对哪些行进行分组?该组仅检索到一行,请务必回复。按分组的字段将重复,添加新记录的字段为secondarySubject和secondaryGrade 我得到的结果是: --------------------------------- 2012-2013 School ABC A-Level in science A 2012-2013 School ABC A
---------------------------------
2012-2013 School ABC A-Level
in science A
2012-2013 School ABC A-Leve
in maths B
2012-2013 School ABC A-Level
in Eng C
-----------------------------------
我想要的是
----------------
2012-2013 School ABC A-Level
in science A
in maths B
in Eng C
-----------------------
$result2 = $db->query('
SELECT *
FROM secondaryEducation
WHERE userID = "'.$graduateID.'"
ORDER BY secondaryFinishDate DESC
');
$html .= '<h2>Secondary Education: '.$option.'</h2>';
while($row = mysql_fetch_assoc($result2))
{
$startYear = formatDate($row['secondaryStartDate'], 'Y');
$finishYear = formatDate($row['secondaryFinishDate'], 'Y');
if (!empty($row['secondaryGrade']))
$secondaryGrade = getSecondaryGradeName($row['secondaryGrade']);
else
$secondaryGrade = $row['secondaryGradeCustom'];
if (!empty($row['secondarySubject']))
$secondarySubject = getSecondarySubjectName($row['secondarySubject']);
else
$secondarySubject = $row['secondarySubjectCustom'];
$score = $row['score'];
$secondaryLevel = getSecondaryLevelName($row['secondaryLevel']);
$levelID = getSecondaryLevelID($row['secondaryLevel']);
if($levelID!=='7')
{
$html .= '
<div class="secondaryListing">
<div><strong>'.$startYear.' - '.$finishYear.' '.stripslashes($row['secondarySchool']).'</strong></div>
<div>'.$secondaryLevel.' in '.$secondarySubject.' - '.stripSlashes($secondaryGrade).'</div>
</div><!-- End education listing -->';
}
在while循环之前,创建一个数组:
$schools = array();
while($row = mysql_fetch_assoc($result2))
...
将字符串添加到$html关联数组中,而不是附加到$html:
if($levelID!=='7')
{
$schools[$startYear.' - '.$finishYear.' '.stripslashes($row['secondarySchool']) . ' ' . $secondaryLevel][]=' in '.$secondarySubject.' - '.stripSlashes($secondaryGrade);
}
最后,在最后,迭代$schools关联数组并将字符串附加到$html:
考虑提供适当的DDL和/或SqLFIDLE连同期望的结果集。还有一些示例数据。现在,请让我知道为for循环提供PHP代码-什么是$HTML之前。=“试图理解”。你是说你有多行2012-2013年学校ABC A-Level?但是你只想看一次?哦,我的天啊,它成功了,非常感谢,最后一件事请注意,第二级仍然在重复,请注意,我如何才能让它也出现一次?我编辑了答案-在if$levelID!='7'assignment我将变量$secondaryLevel从右边移到左边,从条目移到groupoops刚刚意识到条目在重复:有什么具体原因吗?这就像如果有4行,它会打印4次,最初是一条记录,然后是2条记录,直到4你的意思是“in.”$secondarySubject.'-'。stripSlashes$secondaryGrade包含在多个组中?
foreach($schools as $group => $entries)
{
$html .= '<div class="secondaryListing"><div><strong>'.$group.'</strong></div>';
foreach($entries as $entry) {
$html .= '<div>'.$entry.'</div>';
}
$html .='</div><!-- End education listing -->';
}