Question

我正在我的网站上构建一个搜索功能，我在查找SQL中的错误时遇到了一些麻烦。有四个SQL语句用于使用AND和OR关键字返回相同搜索的计数。第二组SQL语句返回AND的实际结果，OR搜索根据当前搜索的页码进行限制。

下面我将展示和计数和搜索的SQL函数。其他两个SQL语句的代码完全相同，只使用OR代替AND。

function _and_count($words) {

    require_once("include/conn.inc.php");

    $arraysize = count($words);

    $and_count_sql = "SELECT COUNT(DISTINCT tg_id)
                       FROM tg_keywords
                       WHERE tg_keyword=";

    if ($arraysize > 1) {
        foreach($words as $word){
            $count = 1;
            if ($count == 1){
                $and_count_sql .= "'".$word."' AND ";
            }
            elseif ($count < $arraysize){
                $and_count_sql .= "tg_keyword='".$word."' AND ";
            }
            else {
                $and_count_sql .= "'".$word."'";
            }
            $count++;
        }

    } elseif ($words == 1) {
        $and_count_sql .= "'".$words."'";
    }

    $and_count_result = mysql_query($and_count_sql)
        or die(mysql_error());

    return $and_count_result;

}


function _search_and($words, $startpos, $endpos) {

    require_once("include/conn.inc.php");

    $arraysize = count($words);

    $search_and_sql = "SELECT DISTINCT tg_id COUNT(*) AS nb
                       FROM tg_keywords
                       LEFT JOIN tg_info
                       ON tg_info.tg_id=tg_keywords.tg_id
                       WHERE tg_keyword=";

    if ($arraysize > 1){
        foreach($words as $word) {
            $count = 1;
            if ($count == 1 && $count < $arraysize) {
                $search_and_sql .= "'".$word."' AND ";
            } elseif ($count == 1 && $count == $arraysize) {
                $search_and_sql .= "'".$word."'";
            } elseif ($count < $arraysize) {
                $search_and_sql .= "tg_keyword='".$word."' AND ";
            } elseif ($arraysize == $count) {
                $search_and_sql .= "'".$word."'";
            }
            $count++;
        }
    } elseif ($arraysize == 1) {
        $search_and_sql .= "'".$words."'";
    } else {
        $search_and_sql .= "''";
    }

    $search_and_sql .= "GROUP BY tg_id
                        ORDER BY nb DESC, tg_info.date_added ASC
                        LIMIT ".$endpos." OFFSET ".$startpos;

    $search_and_result = mysql_query($search_and_sql, $link)
        or die(mysql_error());

    $and_array = mysql_fetch_array($search_and_result);

    return $and_array;


}

任何建议都将不胜感激。谢谢阿奇

Answer 1

 $search_and_sql = "SELECT DISTINCT tg_id COUNT(*) AS nb

tg_id和Count之间缺少逗号。

显示生成的查询的好习惯，即。 echo $ search_and_sql;在mysql_query之前

Answer 2

您在每次循环迭代开始时设置$count = 1，然后测试$count == 1，以便您的SQL最后可能有一个额外的AND。

Answer 3

看起来$ count在foreach循环中始终为1，因此最终得到一个尾随AND

Answer 4

这里没有错误吗？

SELECT DISTINCT tg_id COUNT(*) AS nb

tg_id和COUNT（*）

之间应该有一个“，”

如果错误不是来自这里，您能否回复一下您的SQL查询并给我们结果？

SQL语法中的错误 - 获取此错误并且无法确定错误的位置

4 个答案: