Question

我正在尝试在我的sql中使用相同的参数，但它只识别第一个。看我的代码：

$stmt = $dbh->prepare("SELECT
    (SELECT SUM(oq.value)
    FROM operations_quotas AS oq
        JOIN operations AS o ON oq.operation = o.id
    WHERE o.user = :user AND o.type = 1 AND oq.status = 1
    ) AS total_incomes_open,

    (SELECT SUM(oq.value)
    FROM operations_quotas AS oq
        JOIN operations AS o ON oq.operation = o.id
    WHERE o.user = :user AND o.type = 1 AND oq.status = 2
    ) AS total_incomes_wroteoff");

$stmt->bindParam(":user", $this->getId());
$stmt->execute();

可能吗？

Answer 1

不可能重复使用这样的参数。你必须制作独特的参数：

$stmt = $dbh->prepare("SELECT
    (SELECT SUM(oq.value)
    FROM operations_quotas AS oq
        JOIN operations AS o ON oq.operation = o.id
    WHERE o.user = :user_a AND o.type = 1 AND oq.status = 1
    ) AS total_incomes_open,

    (SELECT COUNT(oq.id)
    FROM operations_quotas AS oq
        JOIN operations AS o ON oq.operation = o.id
    WHERE o.user = :user_b AND o.type = 1 AND oq.status = 2
    ) AS total_incomes_wroteoff");

$stmt->bindParam(":user_a", $this->getId());
$stmt->bindParam(":user_b", $this->getId());
$stmt->execute();

来自Manual：

在调用PDOStatement :: execute（）时，必须为要传递给语句的每个值包含唯一的参数标记。您不能在预准备语句中两次使用同名的命名参数标记。您不能将多个值绑定到单个命名参数，例如，SQL语句的IN（）子句。

在sql中多次使用相同的预处理语句参数

1 个答案: