MySQL更新查询不更新记录

Question

我有一个包含数据

的表格

| id  | player  | runs  |
|-----|---------|-------|
| 1   |    A    | 3000  |
| 2   |    B    | 1000  |
| 3   |    C    | 5000  |

这是一个大数据集的摘要，来自json格式的web服务，我必须使用PHP更新所有行的新数据，为了测试我试图更新所有玩家和SET 3000的运行

foreach($json as $indx=>$val) 
 {
     $upd_qry = "UPDATE info SET runs = 3000 WHERE player='$indx'";//Here on each iteration I'm getting current player and Updating its runs 
     $exec_qry = mysqli_query($con,$upd_qry);

     if ($exec_qry) {
        echo $indx.":".$val;
     }

 }

此查询未更新，请解决此问题

Answer 1

您的查询必须是：

$upd_qry = "UPDATE info SET runs = 3000 WHERE id='$indx'";

Answer 2

foreach($json as $indx=>$val) 
 {
     $upd_qry = "UPDATE info SET runs = 3000 WHERE player='".$indx."'";//Here on each iteration I'm getting current player and Updating its runs 
     $exec_qry = mysqli_query($con,$upd_qry);

     if ($exec_qry) {
        echo $indx.":".$val;
     }

 }

Answer 3

查询应该是这样的：

$upd_qry = "UPDATE info SET runs = 3000 WHERE player=$indx ";

＆＃39>＆＃39;和＆＃34;＆＃34;。单引号表示为字符串，您还必须回显查询，因此您可以检查差异。