Question

我的SQL Server中有一个名为Product的表，其列为ID, NAME, YEAR, COST

示例数据：

ID   NAME     YEAR            COST
----------------------------------                                           
1        A      2006 05 03     4
2        B      2006 04 01     5
3        C      2001 05 01     6
4        D      2002 05 02     7
5        E      2003 04 01     8

我想只将YEAR作为输入，如2006年作为输入，我想要一个显示当年所有增加成本的输出。我该怎么做？

预期输出：

ID   NAME    YEAR         TOTAL
-------------------------------
1     A      2006 05 03     9
2     B      2006 02 01     9
3     C      2001 05 01     6
4     D      2002 05 02     7
5     E      2003 04 01     8

Answer 1

将sum()与over()子句一起使用，并按year()分区。

select T.ID,
       T.Name,
       T.Year,
       sum(T.Cost) over(partition by year(T.Year)) as Cost 
from YourTable as T

SUM (Transact-SQL)
OVER Clause (Transact-SQL)
YEAR (Transact-SQL)

SQL Fiddle

在参数@Year上过滤上述查询将如下所示：

select T.ID,
       T.Name,
       T.Year,
       sum(T.Cost) over() as Cost 
from YourTable as T
where T.Year >= dateadd(year, @Year-1900, '19000101') and
      T.Year < dateadd(year, @Year-1899, '19000101')

Answer 2

使用子查询：

SELECT ID, NAME, year, (select  Sum(Cost)
                         from Product  P1
                         where YEAR(P1.year) = YEAR(P2.year)) as Cost
FROM Product P2
WHERE YEAR(year) = 2006 --your parameter here

演示：http://sqlfiddle.com/#!3/9345d/10

带参数的存储过程如下所示：

CREATE PROCEDURE ProcedureName 
    -- Add the parameters for the stored procedure here
    @Year int  

AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
    select ID, Name, year, (select  Sum(Cost)
                         from Products P1
                         where YEAR(P1.year) = YEAR(P2.year)) as Cost
    from Products P2
    WHERE YEAR(year) = @Year
END
GO

YEAR作为输入

2 个答案: