sql获取值，其中一些值大于值，但不起作用

jq6vz3qz 于 2021-07-24 发布在 Java

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我有这个密码：

Select firstname, lastname, sum(quantity) as quantitySum
FROM Customer
JOIN "Order"
ON Customer.id = "Order".customerid
JOIN orderitem
ON "Order".id = orderitem.orderid
WHERE country = 'Germany'
GROUP BY firstname, lastname
HAVING quantitySum > 500
ORDER BY lastname

但这给了我一个错误。我想不通。感谢你的帮助！

sql mysql sum having

来源：https://stackoverflow.com/questions/62601975/sql-get-values-where-some-is-greater-than-value-with-having-not-working

1条答案

按热度按时间

jmp7cifd1#

Having 条款执行时间 group by 然后 select 所以你必须使用聚合函数 having 如下所示

Select firstname, lastname, sum(quantity) as quantitySum
FROM Customer
JOIN "Order"
ON Customer.id = "Order".customerid
JOIN orderitem
ON "Order".id = orderitem.orderid
WHERE country = 'Germany'
GROUP BY firstname, lastname
HAVING sum(quantity) > 500
ORDER BY lastname

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sql获取值，其中一些值大于值，但不起作用

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