合并SQL Server查询

Question

我正在使用SQL Server，并且我有两个表，我想合并到一个查询中，用它来填充gridview。

表1 dbo.Work
UID（PK，整数）
Tech_Ticket（int）
RMA_Ticket（int）
区域（nchar10）
已完成（nchar10）
FA（nchar10）
代理（nvarchar50）
跟踪（nvarchar50）
Date_Added（日期）
Date_Updated（日期）

表2 dbo.Orders
UID（PK，整数）
订单（整数）
代理（nvarchar50）
机票（整数）
笔记（nvarchar50）

现在，我将它们设置为两个单独的查询和两个单独的表。

查询1：

SELECT [Agent], 
  SUM(CASE WHEN [Date_Added] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'New ', 
  SUM(CASE WHEN [Date_Updated] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'Worked', 
  SUM(CASE WHEN [Completed] = 'yes' AND [Date_Updated] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'Completed', 
  SUM(CASE WHEN [Failure_Analysis] = 'yes' AND [Date_Updated] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'FA' 
  FROM Work 
  GROUP BY [Agent] 

查询2：

SELECT [Agent] 
  SUM(CASE WHEN [Date] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'Orders'
  FROM Orders 
  GROUP BY [Agent] 

有没有办法将这两个查询合并为一个？

Answer 1

您可以JOIN他们。 假设Work是主表，则应如下所示：

SELECT A.*, B.Orders
FROM (  SELECT  [Agent],
                SUM(CASE WHEN [Date_Added] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'New',
                SUM(CASE WHEN [Date_Updated] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'Worked',
                SUM(CASE WHEN [Completed] = 'yes' AND [Date_Updated] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'Completed',
                SUM(CASE WHEN [Failure_Analysis] = 'yes' AND [Date_Updated] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'FA'
        FROM Work 
        GROUP BY [Agent]) A
LEFT JOIN (SELECT   [Agent]
                    SUM(CASE WHEN [Date] BETWEEN @startDate AND @endDate THEN 1 ELSE 0 END) AS 'Orders' 
            FROM Orders 
            GROUP BY [Agent]) B
ON A.[Agent] = B.[Agent]