我在 SQL Server 2005 中有一个包含 ID,paymentType,price
列的表 sales
。
create table sales(id int IDENTITY(1,1),
paymentType varchar(2),
price decimal(10,2) default(0)
)
有没有一种方法可以在一个查询中执行此操作?
SELECT SUM(price) as TE
FROM sales
WHERE paymentType = 'E'
SELECT SUM(price) as TC
FROM sales
WHERE paymentType = 'C'
最佳答案
您可以使用 GROUP BY 按 paymentType 对您的值进行分组,并获得“E”和“C”的两条记录及其总和
SELECT paymentType,SUM(price)
FROM sales
WHERE paymentType = 'E' or paymentType = 'C'
GROUP BY paymentType
关于sql - 如何优化这个查询?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/15812674/