duandang2838 2015-06-06 17:51
浏览 79
已采纳

带有LIKE的MySQL返回错误的行

I have the following:

 $q = "w0";

 $stmt = $db_found->prepare("SELECT DISTINCT callsign FROM NetLog WHERE callsign LIKE ?");
 $stmt->execute(array("%q%"));
 $result = $stmt->fetchAll();
 $print_r($result);

It returns:

Array
(
    [0] => Array
        (
            [callsign] => KA0QIG
            [0] => KA0QIG
        )

)

So what went wrong? Why am I only getting one return when the DB has many values for callsign with 'w0'?

  • 写回答

3条回答 默认 最新

  • drxpt06820 2015-06-06 17:55
    关注

    You are using select distinct with no wildcards. So, you can only get at most one value.

    Perhaps you mean something like this:

    $q = "%w0%";
    
    $stmt = $db_found->prepare("SELECT DISTINCT callsign FROM NetLog WHERE callsign LIKE ?");
    $stmt->execute($q);
    $result = $stmt->fetchAll();
    $print_r($result);
    

    Your version was just looking for the letter "q".

    It occurs to me that you wanted:

    $stmt->execute(array("%$q%"));
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(2条)

报告相同问题?

悬赏问题

  • ¥15 矩阵加法的规则是两个矩阵中对应位置的数的绝对值进行加和
  • ¥15 活动选择题。最多可以参加几个项目?
  • ¥15 飞机曲面部件如机翼,壁板等具体的孔位模型
  • ¥15 vs2019中数据导出问题
  • ¥20 云服务Linux系统TCP-MSS值修改?
  • ¥20 关于#单片机#的问题:项目:使用模拟iic与ov2640通讯环境:F407问题:读取的ID号总是0xff,自己调了调发现在读从机数据时,SDA线上并未有信号变化(语言-c语言)
  • ¥20 怎么在stm32门禁成品上增加查询记录功能
  • ¥15 Source insight编写代码后使用CCS5.2版本import之后,代码跳到注释行里面
  • ¥50 NT4.0系统 STOP:0X0000007B
  • ¥15 想问一下stata17中这段代码哪里有问题呀