Question

Create table #test (Type nvarchar(250), DayCount int, WeekCount int)

insert into #test values ('A/C', 1346, 8095)
insert into #test values ('Cooler', 13, 36)
insert into #test values ('Table Fan', 0, 5)
insert into #test values ('Ceiling Fan', 186, 4507)

输出应为：

Type        DayCount  WeekCount  TotDayCount  TotWeekCount
----------------------------------------------------------
A/C          1346     8095        1445         12643
Cooler       13       36          1445         12643
Table Fan    0        5           1445         12643
Ceiling Fan  186      4507        1445         12643

Answer 1

使用子查询：

SELECT Type,        
       DayCount,
       WeekCount,
       TotDayCount =  ( SELECT SUM(DayCount)
                        FROM Test ),
       TotWeekCount = ( SELECT SUM(WeekCount)
                        FROM Test )
FROM  Test

Sql-fiddle

您不必担心每行都会执行这些查询。 SQL-Server优化器非常智能，只能计算一次。

Answer 2

假设您使用的是相当现代的SQL Server版本，则可以使用twitteR：

SUM OVER

SQL Fiddle

以下是有关select t1.*, sum(daycount) over () as DayTotal, sum(weekcount) over () WeekCount from test t1子句的更多信息： Clicky!

如何在SQL Server中显示列以及分组

2 个答案: