PHP开发的销售趋势分析报表功能在企业资源计划（ERP）系统中的使用

SELECT DATE_FORMAT(sale_date, '%Y-%m') AS month, SUM(sale_amount) AS amount
FROM sales_table
WHERE sale_date BETWEEN '2020-01-01' AND '2020-12-31'
GROUP BY DATE_FORMAT(sale_date, '%Y-%m') 

<?php
// 获取销售数据
$pdo = new PDO('mysql:host=localhost;dbname=sales_db', 'username', 'password');
$sql = "SELECT DATE_FORMAT(sale_date, '%Y-%m') AS month, SUM(sale_amount) AS amount
FROM sales_table
WHERE sale_date BETWEEN '2020-01-01' AND '2020-12-31'
GROUP BY DATE_FORMAT(sale_date, '%Y-%m')";

$stmt = $pdo->prepare($sql);
$stmt->execute();
$data = $stmt->fetchAll(PDO::FETCH_ASSOC);

// 构建图表数据
$labels = [];
$amounts = [];

foreach ($data as $item) {
    $labels[] = $item['month'];
    $amounts[] = $item['amount'];
}

// 生成图表
echo "<canvas id='sales-chart'></canvas>";
?>

<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script>
var ctx = document.getElementById('sales-chart').getContext('2d');
var salesChart = new Chart(ctx, {
    type: 'line',
    data: {
        labels: <?php echo json_encode($labels); ?>,
        datasets: [{
            label: '销售趋势',
            data: <?php echo json_encode($amounts); ?>,
            backgroundColor: 'rgba(0, 123, 255, 0.5)',
            borderColor: 'rgba(0, 123, 255, 1)',
            borderWidth: 1
        }]
    },
    options: {
        responsive: true,
        scales: {
            yAxes: [{
                ticks: {
                    beginAtZero: true
                }
            }]
        }
    }
});
</script>