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Editorial Team
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Asked: 2026-05-24T20:03:02+00:00

First of all, execuse the longer question, but I will try to put it

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First of all, execuse the longer question, but I will try to put it as simply as possible…

I’m trying to write a kind of a reporting query, but I’m having a problem getting the desired results. The problem:

Employee table

Id   |   Name                   
---------------
1    |   John Smith
2    |   Alan Jones
3    |   James Jones

Task table

Id   |   Title   |   StartDate   |   EmployeeId  |  Estimate (integer - ticks)
----------------------------------------------------------------------------
1    |   task1   |   21.08.2011  |   1           |   90000000000
2    |   task2   |   21.08.2011  |   1           |   150000000
3    |   task3   |   22.08.2011  |   2           |   1230000000

Question:

How to get the estimate summary per day, grouped, but to include all the employees?

Like this:

Date           |   EmployeeId   |   EmployeeName    |    SummaryEstimate
 -------------------------------------------------------------
19.08.2011     |   1            |   John Smith      |    NULL
19.08.2011     |   2            |   Alan Jones      |    NULL
19.08.2011     |   3            |   James Jones     |    NULL
20.08.2011     |   1            |   John Smith      |    NULL
20.08.2011     |   2            |   Alan Jones      |    NULL
20.08.2011     |   3            |   James Jones     |    NULL
21.08.2011     |   1            |   John Smith      |    90150000000
21.08.2011     |   2            |   Alan Jones      |    NULL
21.08.2011     |   3            |   James Jones     |    NULL
22.08.2011     |   1            |   John Smith      |    NULL
22.08.2011     |   2            |   Alan Jones      |    1230000000
22.08.2011     |   3            |   James Jones     |    NULL

What I currently do is I have a “dates” table with 30years of days. I left join and group by that table to get other dates included too. Well, here is the query:

  SELECT  dates.value, employee.Id, employee.Name, sum(task.Estimate)

  FROM TableOfDates as dates
  left join Tasks as task on (dates.value = convert(varchar(10), task.StartTime, 101))
  left join Employees as employee on (employee.Id = task.EmployeeId)

  WHERE dates.value >= '2011-08-19' and dates.value < '2011-08-22'

  GROUP BY dates.value, employee.Id, employee.Name

  ORDER BY dates.value, employee.Id

The convert call is to get the date part of the DateTime column.

The result that I get is:

Date           |   EmployeeId   |   EmployeeName    |    SummaryEstimate
 -------------------------------------------------------------
19.08.2011     |   NULL         |   NULL            |    NULL
20.08.2011     |   NULL         |   NULL            |    NULL
21.08.2011     |   1            |   John Smith      |    90150000000    
22.08.2011     |   2            |   Alan Jones      |    1230000000

I am there half of the way, I get dates that are not in the two base joined tables (Employees and Tasks) but I cannot also have all the employees included as in the table shown before this one.

I’ve tried cross-joining, then subqueries, but little luck there. Any help would be very much appreciated ! Thank you for having the time to go through all of this, I hope I was clear enough…

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1 Answer

  1. Editorial Team
    SELECT DE.DateValue, DE.EmployeeId, DE.EmployeeName, sum(task.Estimate)

FROM 
(  SELECT
     D.value AS DateValue
   , E.Id AS EmployeeId
   , E.Name AS EmployeeName
   FROM
   TableOfDates D      
   CROSS JOIN Employees E ) DE
left join Tasks as task on DE.DateValue = convert(varchar(10), task.StartTime, 101)
  AND DE.EmployeeId = task.EmployeeId

WHERE DE.DateValue >= '2011-08-19' and DE.DateValue < '2011-08-22'

GROUP BY DE.DateValue, DE.EmployeeId, DE.EmployeeName

ORDER BY DE.DateValue, DE.EmployeeId
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