Question

当我在搜索框中搜索单词时，如果单词不在我的数据库中，我想添加他给出建议，如果单词已经在数据库中，我只想更新搜索次数这个词可以成为最流行的词汇的顶部。

就像谷歌一样。搜索框有效，但我不知道如何在每次提取行时只插入一次单词。

$cuvant=$_GET['cuvant']; //the word that I introduce in the searching box
$sql="SELECT * from cautare";// cautare is the table where I keep the words
$resursa=mysql_query($sql); //the resource
    while($row = mysql_fetch_array($resursa)) {
        $nr=$row['nr_cautari'];//number of serching of each word
        if ($row['cuvant']!=$cuvant && $cuvant!=''){//if the word is not in the database i want to insert him 
            $nr=1;
            $sql2="INSERT INTO cautare values('".$cuvant."',".$nr.")";
            $resursa2=mysql_query($sql2);
        }else if($row['cuvant']==$cuvant && $cuvant!=''){ //if the word is in the database i just want to uptdate the number_of_searches field
            $nr=$nr+1;
            $sql3="UPDATE cautare set nr_cautari=".$nr."where cuvant='".$cuvant."'";//update the number_of_searches field
            $resursa3=mysql_query($sql3);
            }
    }

Answer 1

在单词字段上添加UNIQUE键，然后：

INSERT INTO table (...)
  VALUES (...)
  ON DUPLICATE KEY UPDATE field=field+1

如果条件为真，如何插入或更新，但不是每行？

1 个答案: