Oracle模型子句是一种在SQL查询中实现数据建模和预测分析的功能
CREATE TABLE sales_data (
product_id NUMBER,
month DATE,
sales_amount NUMBER
);
INSERT INTO sales_data (product_id, month, sales_amount) VALUES (1, '2021-01-01', 1000);
INSERT INTO sales_data (product_id, month, sales_amount) VALUES (1, '2021-02-01', 1200);
-- ... 插入其他数据
sales_model
的模型:SELECT product_id,
month,
sales_amount,
LAG(sales_amount) OVER (PARTITION BY product_id ORDER BY month) AS prev_month_sales,
LAG(sales_amount, 2) OVER (PARTITION BY product_id ORDER BY month) AS prev_prev_month_sales
FROM sales_data
MODEL
DIMENSION BY (product_id)
MEASURES (month, sales_amount, prev_month_sales, prev_prev_month_sales)
RULES (
sales_amount[ANY] = COALESCE(sales_amount[CV()], 0) +
COALESCE(prev_month_sales[CV()], 0) * 0.5 +
COALESCE(prev_prev_month_sales[CV()], 0) * 0.3
)
SELECT product_id,
ADD_MONTHS(MAX(month), 1) AS next_month,
sales_amount AS next_month_sales
FROM sales_data
GROUP BY product_id
MODEL
DIMENSION BY (product_id)
MEASURES (ADD_MONTHS(MAX(month), 1) AS next_month, sales_amount)
RULES (
sales_amount[ANY] = COALESCE(sales_amount[CV()], 0) +
COALESCE(sales_amount[CV() - 1], 0) * 0.5 +
COALESCE(sales_amount[CV() - 2], 0) * 0.3
)
通过以上步骤,您可以使用Oracle模型子句进行数据建模和预测,并将结果可视化。请注意,这里的示例仅用于演示目的,实际应用中可能需要根据具体需求进行调整。