Combining SQL Server Queries

Question

I am using SQL Server and I have two tables and I would like to combine into one query that I can use to fill a gridview.

UID (PK, int)
Tech_Ticket (int)
RMA_Ticket (int)
Region (nchar10)
Completed (nchar10)
FA (nchar10)
Agent (nvarchar50)
Tracking (nvarchar50)
Date_Added (date)
Date_Updated (date)

UID (PK, int)
Order (int)
Agent (nvarchar50)
Ticket (int)
Notes (nvarchar50)

Right now I have them setup as two separate queries and two separate tables.

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] 

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

Is there a way to combine these two queries into one?

Answer 1

You can JOIN them. Assuming that Work is the main table, it should be like this:

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]