Question

基本上我正在为我的网站构建一个serch引擎，但我的sql数据库基本上包含两组表（一组用于站点上的页面，另一组用于文件（.doc等））

我有popluate工作，我得到它返回页面的结果，现在我想搜索两个页面和文件，我想出了运行2个查询（因为2个表集）然后合并这些2将结果数组合成一个，然后按'出现'对它们进行排序，由查询添加。但输出与输入数组不匹配。无论如何一些代码给你一些工作

// Search the DB for pages
$page_result = mysql_query("SELECT p.page_url AS url, COUNT(*) AS occurrences FROM page p, word w, occurrence o WHERE p.page_id = o.page_id AND w.page_word_id = o.page_word_id AND w.word_word LIKE '' '" . $stemmed_string . "' '%' GROUP BY p.page_id ORDER BY occurrences DESC") // LIMIT " . $results . "")
or die("Invalid query: " . mysql_error());

// Search the DB for files
$file_result = mysql_query("SELECT f.file_url AS url, COUNT(*) AS occurrences FROM files f, filenames fn, fileoccurrence fo WHERE f.file_id = fo.file_id AND fn.file_word_id = fo.file_word_id AND fn.file_word LIKE '' '" . $stemmed_string . "' '%' GROUP BY f.file_id ORDER BY occurrences DESC")
or die ("Invalid query: " . mysql_error());

$page_array = mysql_fetch_array($page_result);
$file_array = mysql_fetch_array($file_result);


$results = array_merge((array)$page_array, (array)$file_array);

带有var转储的搜索项（a）的输出如下所示

array（4）{[0] =＆gt; string（33）“/ index.php？page = footy_tipping.htm”[“url”] =＆gt; string（33）“/ index.php？page = footy_tipping.htm”[1] =＆gt; string（4）“1272”[“occurrence”] =＆gt; string（4）“1272”}

array（4）{[0] =＆gt; string（43）“/ files /forms / misc /Adjustment％20TEMPLATE.xls”[“url”] =＆gt; string（43）“/ files /forms / misc /Adjustment％20TEMPLATE.xls”[1] =＆gt; string（1）“2”[“occurrence”] =＆gt; string（1）“2”}

array（6）{[0] =＆gt; string（33）“/ index.php？page = footy_tipping.htm”[“url”] =＆gt; string（43）“/ files /forms / misc /Adjustment％20TEMPLATE.xls”[1] =＆gt; string（4）“1272”[“occurrence”] =＆gt; string（1）“2”[2] =＆gt; string（43）“/ files /forms / misc /Adjustment％20TEMPLATE.xls”[3] =＆gt; string（1）“2”}

它们的排序方式与上面的变量相同

在手册中查看了一下，并没有真正有用的知识如何通过key =＆gt;对数组进行排序值（例如sort（$ results ['occurrence']，DESC））

任何帮助都会得到帮助，谢谢你们：）

Answer 1

如何在sql中作为联盟？

SELECT * FROM (    
    SELECT p.page_url AS url,
        COUNT(*) AS occurrences
    FROM page p, word w, occurrence o
    WHERE p.page_id = o.page_id
        AND w.page_word_id = o.page_word_id
        AND w.word_word LIKE '' '" . $stemmed_string . "' '%'
    GROUP BY p.page_id
    UNION
    SELECT f.file_url AS url,
        COUNT(*) AS occurrences
    FROM files f, filenames fn, fileoccurrence fo
    WHERE f.file_id = fo.file_id
        AND fn.file_word_id = fo.file_word_id
        AND fn.file_word LIKE '' '" . $stemmed_string . "' '%'
    GROUP BY f.file_id
) t
ORDER BY occurrences DESC

Answer 2

你看看array_multisort吗？你必须做这样的事情：

<?php
// Obtain a list of columns
foreach ($results as $key => $row) {
    $occurrences[$key]  = $row['occurrences'];
}

// Sort the data with volume descending, edition ascending
// Add $data as the last parameter, to sort by the common key
array_multisort($occurrences, SORT_DESC, $results);
?>

php：将数组与mysql结果合并，并按数组键对它们进行排序

2 个答案: