在oracle中使用相同的数据值计算一些购买

Question

我有下表

如何编写SQL语句以了解至少有1000次采购具有相同ServiceType，PaymentType和GST值的购买数量？

我知道我需要使用计数聚合，我认为查询应该像这样开始

由于

Answer 1

select count(*) 
from PURCHASE
group by ServiceType, PaymentType, GST
having count(*) >= 1000

Answer 2

我认为你需要数而不是总和。或者，如果您需要总金额，请将金额加总。

SELECT COUNT(PurchaseNo)
FROM PURCHASE
GROUP BY ServiceType, PaymentType, GST
HAVING COUNT(PurchaseNo) >= 1000

Answer 3

你可以这样做：

select COUNT(*),ServiceType, PaymentType, GST 
FROM PURCHASE
having count(*) > 1000
group by ServiceType, PaymentType, GST;