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)
--
Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-sql
