Question

这是表结构

捐赠者（捐献者ID ，姓名）

捐赠（ ID ，捐赠ID，金额）

这是我的疑问：

SELECT donor.name, SUM(donation.amount) "Total"
FROM donor, donation
WHERE donor.donorID = donation.donorID
AND SUM(donation.amount) > 1000;
GROUP BY donor.name
ORDER BY SUM(donation.amount) DESC;

这是错误：

ORA-00934：此处不允许使用群组功能 00934. 00000 - “此处不允许使用群组功能”

当我删除总和（捐赠）时没有错误＆lt; 1000 如何整合它而不出错？请帮忙。

Answer 1

您不能在where子句中放置聚合函数。您需要having子句：

SELECT donor.name, SUM(donation.amount) "Total"
FROM donor, donation
WHERE donor.donorID = donation.donorID
GROUP BY donor.name
HAVING SUM(donation.amount) > 1000
ORDER BY SUM(donation.amount) DESC;

但是，您应该学会使用正确的join语法和表别名：

SELECT d.name, SUM(dn.amount) as "Total"
FROM donor d JOIN
     donation dn
     ON d.donorID = dn.donorID
GROUP BY d.name
HAVING SUM(dn.amount) > 1000
ORDER BY SUM(dn.amount) DESC;

Answer 2

你需要像这样使用HAVING子句：

SELECT donor.name, SUM(donation.amount) "Total"
FROM donor, donation
WHERE donor.donorID = donation.donorID
GROUP BY donor.name
HAVING SUM(donation.amount) > 1000
ORDER BY SUM(donation.amount) DESC;

此外，正如Marc B指出的那样，分号位于终止查询的错误位置。

Answer 3

错字：

AND SUM(donation.amount) > 1000;
                               ^---terminates query
GROUP BY donor.name

group by不是开始新查询的有效方式。

列出捐赠总额大于某事物的所有捐赠者

3 个答案: