将一个表中的行与另一表中的总和值连接起来

Question

我有包含三列IPAddressID、DateFrom和DateTo的表IPAddressHistory，以及包含特定时间详细值的另一个表IPAddressTimeValue。所以，从我需要选择和值IPAddressTimeValue相关的IPAddressID之间DateFrom和DateTo从IPAddressHistory。您可以从sqlfiddle 中看到我想要的内容，例如，我使用了来自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

您需要的查询是这样的：

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];

看看它在这里与您自己选择的联合一起工作：http://sqlfiddle.com/#!6/abfe6/5

要根据需要格式化日期（datefrom 和 dateto），只需使用一些日期格式函数即可。不要忘记在选择字段和分组依据上使用它。