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可能重复：
如何从 MySQL 表中删除重复的行

我一直在互联网上寻找一个体面的答案，但我仍然不明白如何删除重复的行。我在下面有一个查询，有人可以告诉我如何正确实现删除重复行的功能吗？

有任何想法吗？

$bbc_values = array('http://www.bbc.co.uk/news/health-', 
    'http://www.bbc.co.uk/news/politics-', 
    'http://www.bbc.co.uk/news/uk-', 
    'http://www.bbc.co.uk/news/technology-', 
    'http://www.bbc.co.uk/news/world-', 
    'http://www.bbc.co.uk/news/england-', 
    'http://www.bbc.co.uk/news/northern_ireland-', 
    'http://www.bbc.co.uk/news/scotland-', 
    'http://www.bbc.co.uk/news/wales-', 
    'http://www.bbc.co.uk/news/business-',
    'http://www.bbc.co.uk/news/education-',
    'http://www.bbc.co.uk/news/science_and_enviroment-',
    'http://www.bbc.co.uk/news/entertainment_and_arts-');


// BBC Algorithm
foreach ($links as $link) {
    $output = array(
        "title"       => Titles($link), //dont know what Titles is, variable or string?
        "description" => getMetas($link),
        "keywords" => getKeywords($link),
        "link"        => $link
    );
    if (empty($output["description"])) {
        $output["description"] = getWord($link);
    }
    $data = '"' . implode('" , "', $output) . '"';

    if (substr_in_array($output, $bbc_values)) {
        $result = mysql_query("INSERT INTO news_story (`title`, `description`, `keywords`, `link`)    VALUES (" . $data . ")");
        $delete = mysql_query("DELETE FROM news_story WHERE link='{$output['link']}'");

    }
    if (!substr_in_array($output, $bbc_values)) {
        echo "Does not equal data";
    }
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