Mysql 如何将带有having子句的两个查询合并为一个查询？

我希望您能帮助我解决以下两个问题：

select count(distinct ID), sum(AMOUNT) 
from SALES 
where YEAR(SALEDATE) = '2015' and SALETYPE ='CASH'
group by CUSTOMER having sum(AMOUNT) >=500;

select count(distinct ID), sum(AMOUNT) 
from SALES 
where YEAR(SALEDATE) = '2015' and SALETYPE ='CREDITCARD'
group by CUSTOMER having sum(AMOUNT) >=1000;

将它们组合成一个的最佳方式是什么？我的目标是选择所有客户支付现金超过500或通过信用卡支付超过1000的情况

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非常感谢您的帮助。

在您的案例中，您可以使用以下示例：

select  count(distinct ID), 
        sum(AMOUNT) 
from    SALES 
where   YEAR(SALEDATE) = '2015' 
    and SALETYPE ='CASH' 
group by CUSTOMER 
having  sum(AMOUNT) >=500;

UNION

select  count(distinct ID), 
        sum(AMOUNT) 
from    SALES 
where   YEAR(SALEDATE) = '2015' 
    and SALETYPE ='CREDITCARD' 
group by CUSTOMER 
having  sum(AMOUNT) >=1000;

如果希望所有记录都不具有独立性，则可以使用UNION ALL

select  count(distinct ID), 
        sum(AMOUNT) 
from    SALES 
where   YEAR(SALEDATE) = '2015' 
    and SALETYPE ='CASH' 
group by CUSTOMER 
having  sum(AMOUNT) >=500;

UNION ALL

select  count(distinct ID), 
        sum(AMOUNT) 
from    SALES 
where   YEAR(SALEDATE) = '2015' 
        and SALETYPE ='CREDITCARD' 
group by CUSTOMER 
having  sum(AMOUNT) >=1000;

---

在

having

子句中使用条件聚合：

select count(distinct ID), sum(AMOUNT) 
from SALES 
where YEAR(SALEDATE) = '2015' and 
      SALETYPE IN ('CASH', 'CREDITCARD')
group by CUSTOMER
having sum(case when SALETYPE = 'CASH' then AMOUNT end) >= 50 OR
       sum(case when SALETYPE = 'CREDITCARD' then AMOUNT end) >= 1000;

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谢谢。你的书看起来也很有用。然而，它不应该是或代替和吗<代码>金额（SALETYPE=‘现金’后金额结束时的情况）>=50或（！）金额（SALETYPE=‘信用卡’后金额结束时的情况）>=1000@user1269766。对我认为这两个条件都要满足。