使用 having by 子句过滤导致 having 子句中的未知列

Question

我有一个包含这些列的 table：order_date（采用 yyyy-mm-dd 格式）、order_status、product_sub_category、销售额。数据包含 2009 年以后的交易。我想要做的是找到 2011 年和 2012 年之间每个产品类别的总销售额。为此，我使用这些查询：

SELECT 
   YEAR(order_date) AS years, 
   product_sub_category,
   SUM(sales) AS sales 
   FROM dqlab_sales_store
WHERE
   order_status = 'order finished' 
   AND product_sub_category = 'Chairs & Chairmats' 
   OR product_sub_category = 'Office Machines' 
   OR product_sub_category = 'Tables' 
   OR product_sub_category = 'Copiers and Fax' 
   OR product_sub_category = 'Telephones and Communication'
GROUP BY
   YEAR(order_date), product_sub_category
HAVING
   YEAR(order_date) > 2011;

问题是 sql 告诉我 having 子句中的未知列 'order_date'

有什么解决办法吗？谢谢

Answer 1

您不能在同一查询中使用 having 和 where。试试这个：

    SELECT a.years, a.product_sub_category, sum(sales) as sales
 FROM(
        SELECT 
           YEAR(order_date) AS years, 
           product_sub_category,
           sales
        FROM dqlab_sales_store
        WHERE
           order_status = 'order finished' 
           AND (product_sub_category = 'Chairs & Chairmats' 
           OR product_sub_category = 'Office Machines' 
           OR product_sub_category = 'Tables' 
           OR product_sub_category = 'Copiers and Fax' 
           OR product_sub_category = 'Telephones and Communication')) as a
    GROUP BY
       a.years, 
       a.product_sub_category
    HAVING
       a.years > 2011;

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