SQL Row没有打印正确的值

Question

我对SQL语句相当陌生，我试图打印从数据库中出售的单元。在出售单位栏下，它不会打印它将只打印“已售出单位”的号码。任何帮助将不胜感激。 这里是我的代码：

SELECT brand_name, brand_type, Round(avgprice,2) AS "Average Price", "Units Sold" 
FROM lgbrand b 
JOIN (
    SELECT brand_id, Avg(prod_price) AS avgprice 
    FROM lgproduct 
    GROUP BY brand_id 
) sub1 ON b.brand_id = sub1.brand_id 
JOIN (
    SELECT brand_id, Sum(line_qty) AS "Units Sold" 
    FROM lgproduct p 
    JOIN lgline l ON p.prod_sku = l.prod_sku 
    GROUP BY brand_id 
) sub2 ON b.brand_id = sub2.brand_id 

ORDER BY brand_name; 

Answer 1

试试这个：

SELECT brand_name, brand_type, Round(avgprice,2) AS "Average Price", Units_Sold 
FROM lgbrand b 
JOIN (
    SELECT brand_id, Avg(prod_price) AS avgprice 
    FROM lgproduct 
    GROUP BY brand_id 
) sub1 ON b.brand_id = sub1.brand_id 
JOIN (
    SELECT brand_id, Sum(line_qty) AS Units_Sold 
    FROM lgproduct p 
    JOIN lgline l ON p.prod_sku = l.prod_sku 
    GROUP BY brand_id 
) sub2 ON b.brand_id = sub2.brand_id 

ORDER BY brand_name;