douju1852 2011-01-19 08:16
浏览 17

选择插槽最大的行

i need to select one row where slot_left is the biggest. i tried

for ( $i=1;$i<3;$i++) {
    $sql5 = "SELECT * from user u where (
        select max(slot_left) from company c,user u 
        where c.id=u.company_id and c.id='$name'
    )";
    $result5 = mysqli_query($link, $sql5) or die(mysqli_error($link));
    while($row=mysqli_fetch_array($result5)) {  
        // echo the id which the slot_left is the biggest      
        echo $i['slot_left'];
    }
}

but still cannot. please help!

  • 写回答

2条回答 默认 最新

  • duankeye2342 2011-01-19 08:27
    关注
    1. SQL can be. You select all rows from DB.

      $sql5 = "select max(slot_left) AS slot_left from company c,user u where c.id=u.company_id and c.id='$name' GROUP by u.company_id";

    2. $name variable used in query not set

    3. Variable $i is not array. Array is $row

      echo $row['slot_left'];

    评论

报告相同问题?

悬赏问题

  • ¥15 c语言怎么用printf(“\b \b”)与getch()实现黑框里写入与删除?
  • ¥20 怎么用dlib库的算法识别小麦病虫害
  • ¥15 华为ensp模拟器中S5700交换机在配置过程中老是反复重启
  • ¥15 java写代码遇到问题,求帮助
  • ¥15 uniapp uview http 如何实现统一的请求异常信息提示?
  • ¥15 有了解d3和topogram.js库的吗?有偿请教
  • ¥100 任意维数的K均值聚类
  • ¥15 stamps做sbas-insar,时序沉降图怎么画
  • ¥15 买了个传感器,根据商家发的代码和步骤使用但是代码报错了不会改,有没有人可以看看
  • ¥15 关于#Java#的问题,如何解决?