Filter out rows retrospectively in SSRS - filter

Question

I have a table that has three columns: Worker ID, Task Name and Task Status. Each worker has four tasks, Task-1 through Task-4. Each task can have one of two status: Completed or Open. The four tasks are dependent, i.e., later task(s) cannot be Completed until preceding task(s) are completed. I am writing a SSRS report to pull these information out. In the report, I want to display Worker ID/Task Names/Task Status when at least one task is Open (i.e., hide the ones that all four tasks have been completed). Also I want to tally the number of workers that have at least one open task (I figured this out by CountDistinct(WorkerID)), as well as the number of workers that have only Task-4 open (could not figure this out). I have attached a sketch of the report that I wanted in the picture.
Please note: I DO NOT want worker 3 to show since all four tasks have been completed for that worker. If I filtered on the data set by only allowing Open tasks, then the 'Completed' rows for the other two workers are filtered out which is not what I wanted. Thanks.

Answer 1

If you are using SQL Server, you could do this in the dataset and then simply show the output in your report.
The Idea is to group your dataset by your workerid and tast status looking for count <4 or task status = 'OPEN' - In case all four tasks are open.
have a look at this sql fiddle
http://sqlfiddle.com/#!18/e051c/1/0
This should give you the output you desire.
Incase the Fiddle fails -
create table workers
(
workerid int
,taskname varchar (10)
,taskstatus varchar(10)
) ;
insert into workers (workerid,taskname,taskstatus )
values
(1,'Task-1','Completed'),
(1 , 'Task-2' ,'Open' ),
(1 , 'Task-3' ,'Open' ),
(1 , 'Task-4' ,'Open' ),
(2 , 'Task-1' ,'Completed' ),
(2 , 'Task-2' ,'Completed' ),
(2 , 'Task-3' ,'Completed' ),
(2 , 'Task-4' ,'Open' ),
(3 , 'Task-1' ,'Completed' ),
(3 , 'Task-2' ,'Completed' ),
(3 , 'Task-3' ,'Completed' ),
(3 , 'Task-4' ,'Completed' ),
(4 , 'Task-1' ,'Open' ),
(4 , 'Task-2' ,'Open' ),
(4 , 'Task-3' ,'Open' ),
(4 , 'Task-4' ,'Open' )
;with valid_workers as (
Select distinct
workerID
from workers
group by
workerID
,taskstatus
having count(*) <4 or taskstatus = 'Open'
)
Select w.*
from workers w
inner join valid_workers v
on v.workerID = w.workerID ;
-- Result
| workerid | taskname | taskstatus |
|----------|----------|------------|
| 1 | Task-1 | Completed |
| 1 | Task-2 | Open |
| 1 | Task-3 | Open |
| 1 | Task-4 | Open |
| 2 | Task-1 | Completed |
| 2 | Task-2 | Completed |
| 2 | Task-3 | Completed |
| 2 | Task-4 | Open |
| 4 | Task-1 | Open |
| 4 | Task-2 | Open |
| 4 | Task-3 | Open |
| 4 | Task-4 | Open |