Question

$sql = "SELECT message FROM sale WHERE seller_id=? && payment_date=? && bank=?";

$q = $conn->prepare($sql);
$result = $q->execute(array($user_id, $paydate, bank1|| bank2|| bank3));

如何纠正“bank1 || bank2 || bank3”的错误？

Answer 1

$sql = "SELECT message FROM sale WHERE seller_id=? AND payment_date=? 
    AND bank IN (?, ?, ?)";

$q = $conn->prepare($sql);
$result = $q->execute(array($user_id, $paydate, $bank1, $bank2  $bank3));

如果您拥有动态数量的银行（例如，在数组$ bank中）：

$sql = "SELECT message FROM sale WHERE seller_id=? AND payment_date=? ";

$values = array($user_id, $paydate);

if ($banks) {
  $sql .= " AND bank IN (" . implode(",",array_fill(0,count($banks),"?")) . ")";
  $values = array_merge($values, array_values($banks));
}

$q = $conn->prepare($sql);
$result = $q->execute($values);

PS：我建议在SQL中使用AND和OR，而不是&&和||。在标准SQL中，||是字符串连接运算符。你应该养成编写标准SQL的习惯。

Answer 2

将数组保存在数组中，然后将数组放在执行语句中。但您也必须将&& bank=更改为&& bank in ()，因为您将查询动态数量的银行。

如何在OR上选择OR查询条件？

2 个答案: