在继续学习的过程中,我现在正在根据上面学到的内容编写不同的语句,但它没有给出任何结果。Workbench 显示查询语句良好,结果显示为“2”
<?php
$servername = "localhost";
$username = "xxx";
$password = "xxx";
$dbname = "xxx";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql = "SELECT SUM(`mattiscool`),booking_date FROM `wp_cbxrbooking_log_manager` WHERE `booking_date` = CURDATE() -1";
$result = mysqli_query($sql);
while ($row = mysqli_fetch_assoc($result))
{
echo $row['total'];
}
mysqli_close($con);
?>
我试图通过 php 调用 MySQL 语句并输出值。以下是我尝试过的。有人可以帮助我了解我做错了什么吗?
<?php
$sql = "SELECT DAYNAME(wp_cbxrbooking_log_manager.`booking_date`) as \'weekday\', \n"
. " wp_cbxrbooking_log_manager.`party_size` as \'Party Size\',\n"
. " wp_cbxrbooking_log_manager.`booking_time` as \'Time\',\n"
. " wp_cbxrbooking_log_manager.`mattiscool` as \'# of Reservations\'\n"
. "FROM wp_cbxrbooking_log_manager\n"
. "\n"
. "WHERE `booking_date` >= DATE(NOW()) - INTERVAL 7 DAY \n"
. "ORDER BY `Time` ASC";
?>
天涯尽头无女友
达令说