Php 计算SQL组中的行数
我有一个脚本,我想放在仪表板上。SQL将在while中工作并对项目进行分组,并正确显示在仪表板中。然而,我也希望数量的显示 因此,如果SQL正在分组,我如何计算它返回的行数,以便将每行的数量回显到表中。这是我的密码Php 计算SQL组中的行数,php,mysql,Php,Mysql,我有一个脚本,我想放在仪表板上。SQL将在while中工作并对项目进行分组,并正确显示在仪表板中。然而,我也希望数量的显示 因此,如果SQL正在分组,我如何计算它返回的行数,以便将每行的数量回显到表中。这是我的密码 <?php $servername = "localhost"; $username = "root"; $password = "root"; $dbname = "dbname"; $custid = $row['CustomerID
<?php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "dbname";
$custid = $row['CustomerID'];
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql1 = "SELECT * FROM stock
JOIN hardware ON stock.HardwareID = hardware.HardwareID
WHERE stock.CustomerID = $custid GROUP BY stock.HardwareID";
$result1 = $conn->query($sql1);
if ($result1->num_rows > 0) {
// output data of each row
while($row1 = $result1->fetch_assoc()) {
echo "<tr>";
echo "<td>".$row1['Hardware']."</td>";
echo "<td></td>";
echo "</tr>";
}
}
?>
因此,我们的目的是要引起争论
echo "<td></td>";
echo”“;
其中有一个变量,显示分组的每一行的数量。您可以使用此查询,分组查询必须选择并提供聚合,这里我提供了计数,如果您需要一些适当的列,您可以相应地更改它
<?php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "dbname";
$custid = $row['CustomerID'];
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql1 = "SELECT stock.Hardwareid, count(*) as CountHardware FROM stock
JOIN hardware ON stock.HardwareID = hardware.HardwareID
WHERE stock.CustomerID = $custid GROUP BY stock.HardwareID";
$result1 = $conn->query($sql1);
if ($result1->num_rows > 0) {
// output data of each row
while($row1 = $result1->fetch_assoc()) {
echo "<tr>";
echo "<td>".$row1['Hardware']."</td>";
echo "<td></td>";
echo "</tr>";
}
}
?>
您可以使用此查询,分组查询必须选择并提供聚合,这里我提供了计数,如果您需要一些适当的列,您可以相应地更改它
<?php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "dbname";
$custid = $row['CustomerID'];
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
$sql1 = "SELECT stock.Hardwareid, count(*) as CountHardware FROM stock
JOIN hardware ON stock.HardwareID = hardware.HardwareID
WHERE stock.CustomerID = $custid GROUP BY stock.HardwareID";
$result1 = $conn->query($sql1);
if ($result1->num_rows > 0) {
// output data of each row
while($row1 = $result1->fetch_assoc()) {
echo "<tr>";
echo "<td>".$row1['Hardware']."</td>";
echo "<td></td>";
echo "</tr>";
}
}
?>
MySQL还是SQL Server?请在选择标记时更加小心。抱歉修复了此问题。MySQL或SQL Server?请在选择标签时更加小心。抱歉修复了此问题。此功能非常有效。我只需要做一个更改。$sql1=“选择stock.Hardwareid,hardware.hardware,count(*)作为CountHardware从stock中加入stock.Hardwareid=Hardwareid=Hardwareid,其中stock.CustomerID=$custid GROUP BY stock.Hardwareid”;但我会接受这个答案。谢谢。这工作做得很好。我只需要做一个更改。$sql1=“选择stock.Hardwareid,hardware.hardware,count(*)作为CountHardware从stock中加入stock.Hardwareid=Hardwareid=Hardwareid,其中stock.CustomerID=$custid GROUP BY stock.Hardwareid”;但我会接受这个答案。谢谢