Question

我正在使用这样的代码

$query = "SELECT Max(Vote) FROM VoteTab"; 
$result = mysqli_query($this->link,$query);
$query_data = mysqli_fetch_assoc($result);

foreach ($query_data as $record){
    $VoteCount=$record['Vote'];
    echo $VoteCount;
}

它返回值5，但实际值是56.如果值是67，那么它只返回6.但它在我的localhost中对我来说很好。

Id    Vote Name
1      23  Rohan
2      56  Vivek
3      32  Rahul
4      78  Broh
5      0   Tack
6      0   grey

Answer 1

mysqli_fetch_assoc()获取结果的一行，然后使用foreach进行迭代，这是错误的。正确的代码应该是：

$query = "SELECT Max(Vote) FROM VoteTab"; 
$result = mysqli_query($this->link,$query);
$query_data = mysqli_fetch_assoc($result);
echo $query_data['Max(Vote)'];

Answer 2

您只需更新查询：

$query = "SELECT Vote FROM VoteTab order by Vote desc limit 1"; 

$result = mysqli_query($this->link,$query);

$query_data = mysqli_fetch_assoc($result);


foreach ($query_data as $record){

    $VoteCount=$record['Vote'];

    echo $VoteCount;

         }

MAX（）函数在sql中只返回数字的第一个字符

2 个答案: