Question

我的PHP看起来像这样：

$sql1="SELECT @rownum := @rownum + 1 Rank, q.* FROM (SELECT @rownum:=0) r,(SELECT  * ,sum(`number of cases`) as tot, sum(`number of cases`) * 100 / t.s AS `% of total` FROM `myTable` CROSS JOIN (SELECT SUM(`number of cases`) AS s FROM `myTable` where `type`=:criteria and `condition`=:diagnosis) t where `type`=:criteria and `condition`=:diagnosis group by `name` order by `% of total` desc) q"";
$stmt = $dbh->prepare($sql1);
$stmt->bindParam(':criteria', $search_crit, PDO::PARAM_STR);
$stmt->bindParam(':diagnosis', $diagnosis, PDO::PARAM_STR);
$stmt->execute();
$result1 = $stmt->fetchAll(PDO::FETCH_ASSOC);
header('Content-type: application/json');
echo json_encode($result1);

我在这一行收到错误：$stmt->execute();

错误说：

PHP致命错误：未捕获的异常＆＃39; PDOException＆＃39;消息＆＃39; SQLSTATE [HY093]：参数号无效＆＃39;在php / rankings.php:39

堆栈追踪：

＆＃34;＃＆＃34; 0 php / rankings.php（39）：PDOStatement-＆gt; execute（）

＆＃34;＃＆＃34; 1 {main}     在第39行的php / rankings.php中抛出

我该如何解决这个问题？我知道我可以用准备好的声明传递多个变量，但我不太清楚如何去做。

Answer 1

您只能在查询中使用一次参数

$sql1="SELECT @rownum := @rownum + 1 Rank, q.* FROM (SELECT @rownum:=0) r,(SELECT  * ,sum(`number of cases`) as tot, sum(`number of cases`) * 100 / t.s AS `% of total` FROM `myTable` CROSS JOIN (SELECT SUM(`number of cases`) AS s FROM `myTable` where `type`=:criteria and `condition`=:diagnosis) t where `type`=:criteria2 and `condition`=:diagnosis2 group by `name` order by `% of total` desc) q";
$stmt = $dbh->prepare($sql1);       
$stmt->execute(array(':criteria' => $search_crit, ':diagnosis' => $diagnosis, ':criteria2' => $search_crit, ':diagnosis2' => $diagnosis));

Answer 2

您可以像下面这样在execute语句中添加一个数组：

curl: (28) Operation timed out

绑定准备语句的多个参数

2 个答案: