Message-ID: <51FF238B.1080707@gmail.com>
Date: Sun, 04 Aug 2013 22:01:15 -0600
From: Rob Sargentg <robjsargent@gmail.com>
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Subject: Re: Presenting data in 5 Rows & 5 Cols for 25 specific values
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On 08/03/2013 07:26 AM, F Bax wrote:
> I have a table containing tasks completed in a game I'm playing.  The 
> game includes an extra BINGO Challenge where each cell of standard 
> BINGO card contains a particular task to be completed.  The goal is 
> score a BINGO (row, column, diagonal) by completing five (or more) 
> tasks from the BINGO cards.  My task table contains more tasks 
> completed than the one included in the BINGO challenge.
>
> SELECT task, CASE WHEN task='Task27' THEN 'R1C1' WHEN task='Task32' 
> THEN 'R1C2' ... WHEN task='Task94' THEN 'R5C5' END AS bingo FROM tasks 
> WHERE bingo IS NOT NULL;
>
> This query will retrieve all tasks related to the BINGO that I have 
> completed and present them in a simple list.  I would like to arrange 
> the tasks as a BINGO card; so that I can easily see my progress on 
> various rows & columns working toward a BINGO.
>
> Any suggestions?
>
> BONUS points will be awarded if the query displays a row with 5 NULL 
> values if no tasks are completed in that row.

  I haven't noticed any posting showing your exact table definition, but 
here's more still running on my assumptions and short-cuts.  Of course 
this would all be trivial if the data were sucked into any reasonable 
language adn delt with there for shipment to the UI.


Adding this list of accomplished tasks (the first diagonal)

insert into bingo values
('bingo','rjs','task0',0, 0),
('bingo','rjs','task6',1, 1),
('bingo','rjs','task12',2, 2),
('bingo','rjs','task18',3, 3),
('bingo','rjs','task24',4, 4)
;

\pset null 'not done'-- you'll probably need to use outer joins and to 
coalesce null values.

select r,c,
(select task from bingo i where c = 0 and username = 'rjs'
and i.task = b.task and mod(r,5) = 0) as "B",
(select task from bingo i where c = 1 and username = 'rjs'
and i.task = b.task and mod(r,5) = 1) as "I",
(select task from bingo i where c = 2 and username = 'rjs'
and i.task = b.task and mod(r,5) = 2) as "N",
(select task from bingo i where c = 3 and username = 'rjs'
and i.task = b.task and mod(r,5) = 3) as "G",
(select task from bingo i where c = 4 and username = 'rjs'
and i.task = b.task and mod(r,5) = 4) as "O"
from bingo b
where username = 'rjs'
;

r  | c |    B     |    I     |    N     |    G     | O
---+---+----------+----------+----------+----------+----------
  0 | 0 | task0    | not done | not done | not done | not done
  1 | 1 | not done | task6    | not done | not done | not done
  2 | 2 | not done | not done | task12   | not done | not done
  3 | 3 | not done | not done | not done | task18   | not done
  4 | 4 | not done | not done | not done | not done | task24
(5 rows)


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