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 don't think you've fully described your tables so I've ad libbed a
little. This is not a complete solution (and certainly no bonus point)
but it should give you one starting point. Your CTE will have to deal
with transforming the RmCn into something more useful
create table bingo (ttype text, username text, task text, r int, c int);
begin;
insert into bingo values
('bingo','me','task0',0, 0),
('bingo','me','task1',0, 1),
('bingo','me','task2',0, 2),
('bingo','me','task3',0, 3),
('bingo','me','task4',0, 4),
('bingo','me','task5',1, 0),
('bingo','me','task6',1, 1),
('bingo','me','task7',1, 2),
('bingo','me','task8',1, 3),
('bingo','me','task9',1, 4),
('bingo','me','task10',2, 0),
...
('bingo','me','task71',14, 1),
('bingo','me','task72',14, 2),
('bingo','me','task73',14, 3),
('bingo','me','task74',14, 4)
with bingoline as (
select r, array_agg(task) as taskline from bingo where mod(r,5) = 0 and
username = 'me' group by r
union --
select r, array_agg(task) as taskline from bingo where mod(r,5) = 1 and
username = 'me' group by r
union --
select r, array_agg(task) as taskline from bingo where mod(r,5) = 2 and
username = 'me' group by r
union --
select r, array_agg(task) as taskline from bingo where mod(r,5) = 3 and
username = 'me' group by r
union --
select r, array_agg(task) as taskline from bingo where mod(r,5) = 4 and
username = 'me' group by r
)
select array_to_string(bl.taskline, '|', 'nil') from bingoline bl order
by bl.r;
;
Bingo Card
------------------------------------
task0|task1|task2|task3|task4
task5|task6|task7|task8|task9
task10|task11|task12|task13|task14
task15|task16|task17|task18|task19
task20|task21|task22|task23|task24
task25|task26|task27|task28|task29
task30|task31|task32|task33|task34
task35|task36|task37|task38|task39
task40|task41|task42|task43|task44
task45|task46|task47|task48|task49
task50|task51|task52|task53|task54
task55|task56|task57|task58|task59
task60|task61|task62|task63|task64
task65|task66|task67|task68|task69
task70|task71|task72|task73|task74
(15 rows)
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