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我一直以準備好的語句爲我的生活而奮鬥。我嘗試過的每個站點都有不同的語法。這是我想要完成的:MySQL準備好的語句語法
$stmt = $mysqli->prepare("SELECT IdNum FROM TOAWorkOrdersNew WHERE WorkDate = ? AND TechNum = ?");
$stmt2 = $mysqli->prepare("SELECT IdNum FROM CallVolume WHERE WorkDate = ? AND ANI = ?");
---loop
----loop
$stmt->bind_param('ss', $IncDate, $TechNum);
$stmt->execute();
$stmt->store_result();
$WorkOrders = $stmt->num_rows;
$SubWorkOrders = $SubWorkOrders + $WorkOrders;
$stmt->free_result();
$stmt->close();
$stmt2->bind_param('ss', $IncDate, $CellNum);
$stmt2->execute();
$stmt2->store_result();
$CallCount = $stmt2->num_rows;
$SubCallCount = $SubCallCount + $CallCount;
$stmt2->free_result();
$stmt2->close();
}
}
該語句返回NULL。
哪些語句返回NULL? – Barmar