如何使用PHP从MySQL INSERT ... SELECT查询中提取数据

Question

我有以下代码;

// tenant charge

$tenant_charge_date_created = date("Y-m-d H:i:s");
$tenant_charge_date_updated = date("Y-m-d H:i:s");

$sql ="INSERT into accounts_tenant_charge (
tenant_charge_date,
tenant_charge_payment_terms,
tenant_charge_tenancy_id,
tenant_charge_notes,
tenant_charge_total_amount,
tenant_charge_date_created,
tenant_charge_date_updated,
tenant_charge_created_by,
tenant_charge_updated_by
)
SELECT
tenant_charge_date,
tenant_charge_payment_terms,
tenant_charge_tenancy_id,
tenant_charge_notes,
tenant_charge_total_amount,
'$tenant_charge_date_created',
'$tenant_charge_date_created',
tenant_charge_created_by,
tenant_charge_updated_by
FROM accounts_tenant_charge
WHERE tenant_charge_id='" . $process_rtc_row['tenant_charge_recurring_tenant_charge_id'] . "'";

if (!mysqli_query($con,$sql)) {
  die('Error Inserting Tenant Charge Data into Database: ' . mysqli_error($con));
} else {

$tenant_charge_id = mysqli_insert_id($con);

echo '<p>The tenant charge (ID: ' . $tenant_charge_id . ') has sucessfully been added to the system.</p>';

}

如何访问所选字段的值？例如，如何访问“＆tenvant_charge_total_amount”＆＃39; tenant_charge_total_amount＆＃39;值，以便我可以在查询之外使用它。