Home/ Questions/Q 354707
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-12T11:56:58+00:00

So I have a table that looks like this: ProjectID TaskID Date 000 001

  • 0

So I have a table that looks like this:

ProjectID    TaskID     Date
000          001        10/28/09
000          002        12/1/09
000          003        02/24/10
001          001        04/14/10
001          002        07/5/10
001          003        02/24/11
002          001        06/07/10
002          002        07/7/10
002          003        09/13/12

Assume there are many projects and many tasks, but each project contains the same tasks. I want to copy dates in the following manner:

One project (000) has the master dates. I want to copy those dates for each task to several other projects (001, 002 in the example data).

So, if task 001 in project 000 has a date of 10/28/09, I want task 001 in other projects (I know their IDs) to have the same date.

If task 002 in project 001 has date 12/1/09, I want task 002 to have this date in each of the other projects as well.

Is there one query that can do this? I think there should be, but I can’t figure it out right now.

BTW I am using SqlServer 2005.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team
    UPDATE dbo.Projects
SET Date = (SELECT Date FROM dbo.Projects p1
            WHERE p1.ProjectID = '000' AND p1.TaskID = dbo.Projects.TaskID)
WHERE ProjectID IN ('P01', 'P02', 'P03', 'P04')
AND TaskID IN ('001', '002', '003')

    Would that do it for you?

    So for TaskID = 001, this statement will 

     SELECT Date FROM dbo.Projects WHERE ProjectID = '000' AND TaskID = '001'

    and then update each of the projects (P01-P04) and TaskID=001 to this date. That’s what you’re looking for, no??

    You can also use an OUTPUT clause to PROVE to you what is being updated:

    UPDATE dbo.Projects
SET Date = (SELECT Date FROM dbo.Projects p1
            WHERE p1.ProjectID = '000' AND p1.TaskID = dbo.Projects.TaskID)
OUTPUT inserted.ProjectID, inserted.TaskID, inserted.Date
WHERE ProjectID IN ('P01', 'P02', 'P03', 'P04')
AND TaskID IN ('001', '002', '003')

    This will cause each row being updated to output the new values (e.g. after the update) so you can check and see what gets updated, and to what values.

    Just ran the query and this is the results I get:

    ProjectID   TaskID  Date
   0       1    2009-10-28 00:00:00.000
   0       2    2009-12-01 00:00:00.000
   0       3    2010-02-24 00:00:00.000
   1       1    2009-10-28 00:00:00.000
   1       2    2009-12-01 00:00:00.000
   1       3    2010-02-24 00:00:00.000
   2       1    2009-10-28 00:00:00.000
   2       2    2009-12-01 00:00:00.000
   2       3    2010-02-24 00:00:00.000

    The dates for Projects 1 and 2 and Tasks 1,2,3 have been set to the values of the “master” project 0.

    • 0