从一个表与和值加入一行从另一个表

Question

我有表IPAddressHistory包含三列IPAddressID，DateFrom和DateTo，和另一个表IPAddressTimeValue与特定时间的详细值。所以，我需要选择和值从IPAddressTimeValue通过IPAddressID从IPAddressHistory DateFrom和DateTo之间有关。你可以从sqlfiddle中看到我想要的，例如，我使用的是从IPAddressHistory和UNION ALL的简单静态日期。谢谢。

初始表：

CREATE TABLE IPAddressHistory(
    [IPAddressHistoryID] int IDENTITY(1,1) NOT NULL, 
    [IPAddressID] int NOT NULL, 
    [DateFrom] datetime, 
    [DateTo] datetime, 
CONSTRAINT [PK_IPAddressHistory] PRIMARY KEY CLUSTERED 
(
    [IPAddressHistoryID] ASC 
) 
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY]; 

CREATE TABLE IPAddressTimeValue(
    [IPAddressTimeValueID] int IDENTITY(1,1) NOT NULL, 
    [IPAddressID] int NOT NULL, 
    [Time] datetime, 
    [CCNI] int, 
    [TRNI] int, 
CONSTRAINT [PK_IPAddressTimeValue] PRIMARY KEY CLUSTERED 
(
    [IPAddressTimeValueID] ASC 
) 
WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY]; 

初始数据：

结果输出：

Answer 1

您所需要的查询是这一个：

select a.[IPAddressID], 
     a.[DateFrom], 
     a.[DateTo], 
     SUM([CCNI]) [CCNI], 
     SUM([TRNI]) [TRNI] 
    from IPAddressHistory a 
     INNER JOIN IPAddressTimeValue b 
       ON (a.[IPAddressID] = b.[IPAddressID]) 
where b.[Time] > a.[DateFrom] 
    and b.[Time] <= a.[DateTo] 
group by a.[IPAddressID], a.[DateFrom], a.[DateTo]; 

看到它在这里工作与你自己的选择工会：http://sqlfiddle.com/#!6/abfe6/5

要想根据需要格式化日期（datefrom和dateto），只需使用一些日期格式函数。不要忘记在group by上的select字段中使用它。

Answer 2

我不知道我是否正确理解，但你需要这样的东西？通过IPAddressID连接表并使用DateFrom,DateTo从History表中获得WHERE子句？

更新

select h.IPAddressID, sum(CCNI) as CCNI, sum(TRNI) as TRNI, DateFrom, DateTo 
from IPAddressHistory h 
left join IPAddressTimeValue v on h.IPAddressID = v.IPAddressID 
where v.[time] > h.DateFrom and v.[time] <= h.DateTo 
group by h.IPAddressID, DateFrom, DateTo 

您可以测试它：SQL FIDDLE