查询没有按顺序返回


Query not returning in order

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我现在完全困惑了,因为我在一个未完成项目的这一部分中有一段功能正常的代码,或者我是这样认为的。我在寻找任何可以帮助解决这个问题的建议。

我没有得到一个"理智"的结果,我做同样的事情两次,得到不同的结果。这两段代码都成功返回了同一个问题的所有答案,但其中一段在准确的代码块内按顺序17、18、19、16显示,而另一段则按正确的顺序显示16、17、18、19。

在第二段代码中也是如此,它是给定问题和与之相关的所有答案的更详细视图的一部分(只是第一个代码的更详细视图),编辑函数将编辑正确的代码,但删除复选框失败并删除错误的项。这种模式与故障代码的视觉顺序也不一致,而且看起来相当随机。这可能是相同的问题,也可能是不同的问题,我正在调查。

下面是两段代码,其中一段显示一个问题的所有答案的数据行:
    $query2 = "SELECT * FROM ST_Answers
    WHERE referencingQuestionID = '$permIDNum'
    ORDER BY 'permanentAnsNumber'";
    $result2 = mysql_query($query2);
    $ret = "";
    $letter = "a";
    $ret .= "<div class='lq answerListItem'>";
    $ret .= "<span class='lqh2 answerNumber'> &nbsp; </span>";
    $ret .= "<span class='lqh2 answerTextBody'>Answer Text Body</span>";
    $ret .= "<span class='lqh2 answerSummaryText'>Answer Summary Text</span>";
    $ret .= "<span class='lqh2 answerNextQuestion'>Next Q#</span>";
    $ret .= "<span class='lqh2 correct'>Correct?</span>";
    $ret .= "</div>";

    $i = 0;
    $n = mysql_numrows($result2);
    while( $i < $n ){
            $permAID = mysql_result($result2,$i,"permanentAnsNumber");
        $aText = mysql_result($result2,$i,"answerswerTextBody");
        $aSummary = mysql_result($result2,$i,"answerswerSummaryText");
        $nextQID = mysql_result($result2,$i,"nextQuestionID");
        $correctA = mysql_result($result2,$i,"correctAnswer");
        $ret .= "<div class='lq answerListItem'>";
        if($letter != "a") { $ret .= "<br/>"; }
        $ret .= "<span class='lq answerNumber'> &nbsp; </span>";
            $ret .= "<span class='lq answerTextBody'>" . $letter . ") $aText </span>";
        $ret .= "<span class='lq answerSummaryText'>" . $aSummary . "</span>";
        $ret .= "<span class='lq answerNextQuestion'>" . $nextQID . "</span>";
        $ret .= "<span class='lq correct'>" . $correctA . "</span>";
        $letter++;
        $ret .= "</div>";
        $i++;
    }

这第二段代码,是显示相同的数据,但使用相同的查询多一点,但不是显示项目无序,它以正确的顺序显示它们,但代码几乎完全相同!

$query2 = "SELECT * FROM ST_Answers
    WHERE referencingQuestionID='$permID' 
    ORDER BY 'permanentAnsNumber'";
$result2 = mysql_query($query2);
$ret .= "<div id='answerContainer'><h3>Associated Answers: </h3>";
$i = 0;
$n = mysql_numrows($result2);
// NOTE: This is displaying everything in correct order
// TODO: Reference this
while( $i < $n ){
        $permAID = mysql_result($result2,$i,"permanentAnsNumber");
    $aText = mysql_result($result2,$i,"answerswerTextBody");
    $aSummary = mysql_result($result2,$i,"answerswerSummaryText");
    $nextQID = mysql_result($result2,$i,"nextQuestionID");
    $correctA = mysql_result($result2,$i,"correctAnswer");
    $ret .= "<div class='answerRow'>";
        $ret .= "<span class='perAID'>" . "<h5>Answer ID(Warning do not change):<textarea rows='1' cols='4' name='ids[]'>" . $permAID . "</textarea></span></h5>";
        $ret .= "<span class='aText'>" . "Answer Text: <br /><textarea name='aTxt[]' rows='5' cols='40'>" . $aText . "</textarea></span><br />";
        $ret .= "<span class='aSummary'>" . "Answer Summary: <br /><textarea name='aSum[]' rows='5' cols='40'>" . $aSummary . "</textarea></span><br />";
        $ret .= "<span class='nextQID'>Question this leads to: <textarea name='nxtQID[]' rows='1' cols='4'>" . $nextQID . "</textarea></span><br />";
        $ret .= "<span class='correctA'>" . "Answer point value: <textarea name='ansCorrect[]' rows='1' cols='2'>" . $correctA . "</textarea></span><br />";
        $ret .= "<span class='del'><h6>Delete? <input type='checkbox' name='delete[]'></h6></span><br />";
    $ret .= "</div><br />";
    $i++;
}

有人知道从哪里开始吗?

您的问题是在列名周围使用了引号。以这种方式将常量字面值字符串引入ORDER BY,可以有效地消除结果集的排序。

改变
$query2 = "SELECT * FROM ST_Answers WHERE referencingQuestionID = '$permIDNum' 
           ORDER BY 'permanentAnsNumber'";
                    ^                  ^

$query2 = "SELECT * FROM ST_Answers WHERE referencingQuestionID = '$permIDNum' 
           ORDER BY permanentAnsNumber";

这里是SQLFiddle demo。

旁注:学习和使用PDO或mysql的预备语句。

我建议你改变你的风格,试着用这个

$query2 = "SELECT * FROM ST_Answers WHERE referencingQuestionID='$permID' ORDER BY permanentAnsNumber";
$result2 = mysql_query($query2);
$ret .= "<div id='answerContainer'><h3>Associated Answers: </h3>";
while($row = mysql_fetch_assoc($result2)) {
    $ret .= "<div class='answerRow'>";
        $ret .= "<span class='perAID'>" . "<h5>Answer ID(Warning do not change):<textarea rows='1' cols='4' name='ids[]'>" . $row["permanentAnsNumber"] . "</textarea></span></h5>";
        $ret .= "<span class='aText'>" . "Answer Text: <br /><textarea name='aTxt[]' rows='5' cols='40'>" . $row["answerswerTextBody"] . "</textarea></span><br />";
        $ret .= "<span class='aSummary'>" . "Answer Summary: <br /><textarea name='aSum[]' rows='5' cols='40'>" . $row["answerswerSummaryText"] . "</textarea></span><br />";
        $ret .= "<span class='nextQID'>Question this leads to: <textarea name='nxtQID[]' rows='1' cols='4'>" . $row["nextQuestionID"] . "</textarea></span><br />";
        $ret .= "<span class='correctA'>" . "Answer point value: <textarea name='ansCorrect[]' rows='1' cols='2'>" . $row["correctAnswer"] . "</textarea></span><br />";
        $ret .= "<span class='del'><h6>Delete? <input type='checkbox' name='delete[]'></h6></span><br />";
    $ret .= "</div><br />";
}

正如Peterm所说,在这段代码中,不能在'ORDER BY'说明符周围加上引号。一旦在这段代码以及上面的父段代码中固定,一切都正确显示。

使用字符串和变量连接方法,同时尝试在查询或字符串中使用php变量。'ORDERBY'后不需要引号。这个也要小心……这些变化可能对你有帮助。

更改查询:

$query2 = "SELECT * FROM ST_Answers WHERE referencingQuestionID = .’"。permIDNum美元。"' ORDER BY permanentAnsNumber ';