计算sql查询中特定列的总数

Question

我想计算特定列的总数

对于ex，我的表必须看起来像这样

     Customername  Payment    id    RunningTotal
       a           500        5          5
       b           500        10         10
       c           300        10         7
                  ------              -----------
                   1300                  22  

我正在获取该表，但现在我想计算最后提到的支付和RunningTotal列的总数。

Answer 1

如果从表t1获得上述结果，则可以使用Union语句在末尾添加总和。像这样的东西

select Customername, Payment, id, RunningTotal
from t1
union all
select null,sum(payment),null,sum(runningtotal or any total)
from t1

这将在结果的末尾添加总付款和其他总额。

Answer 2

SELECT Sum(Payment) AS Total FROM tablename;

输出：总计= 1300

Answer 3

select sum(Payment) as SumPayment, sum(RunningTotal) as SumRunningTotal
from yourTable

Answer 4

如果你想对所有行求和，就像它一样简单：

select sum(payment) payment_sum, sum(runningtotal) runningtotal_sum
from customers;

Answer 5

不使用GROUPBY子句，请使用OVER()

示例：
select Customername, sum(Payment) OVER () AS TotalPayment, id, sum(RunningTotal) over() 作为RunningTotal 来自t1