SQL：有条件求和

Question

我建立了一个查询，以将公司的销售统计数据与其他公司进行比较。

简化，就像：

SELECT SUM(CASE WHEN company=foobar THEN sales ELSE 0) as sales_foobar,
SUM(sales) as sales_total, country, year, product FROM sales_table
GROUP BY country, year, product HAVING (the above sum again) > 0

遵从性规则要求，仅显示公司有任何销售的行，而我的代码将丢弃foobar没有销售的行，而由于订单和退款相等，它也会删除销售为0的行。 / p>

现在，我如何才能只获取公司拥有销售数据的行？

Answer 1

您可以在mysqlimport: Error: 1083, Field separator argument is not what is expected; check the manual, when using table: wp_posts 子句中计算与公司匹配的行数：

HAVING

Answer 2

您应该使用Where：

   SELECT SUM(CASE WHEN company=foobar THEN sales ELSE 0) as sales_foobar,
    SUM(sales) as sales_total, country, year, product 
    FROM sales_table
    Where sales > 0
    GROUP BY country, year, product HAVING (the above sum again) > 0

Answer 3

根据您的问题，假设company ='foobar； 您几乎只在代码中完成了答案。因此，如果您需要除此以外的任何其他特定条件，请告诉我。我会编辑答案。

SELECT 
    SUM (CASE WHEN company='foobar' THEN sales ELSE 0 end) as sales_foobar,
    SUM(sales) as sales_total, 
    country, 
    year, 
    product 
        FROM sales_table
            GROUP BY country, year, product 
                HAVING SUM (CASE WHEN company='foobar' THEN sales ELSE 0 end) > 0