oracle apex chart - line graph sql?

Question

select count(case when extract(month from C_DATE) = 1 then 1 end) as Jan,
   count(case when extract(month from C_DATE) = 2 then 1 end) as feb,
   count(case when extract(month from C_DATE) = 3 then 1 end) as mar,
   count(case when extract(month from C_DATE) = 4 then 1 end) as april,
   count(case when extract(month from C_DATE) = 5 then 1 end) as may,
   count(case when extract(month from C_DATE) = 6 then 1 end) as jun,
   count(case when extract(month from C_DATE) = 7 then 1 end) as jul,
   count(case when extract(month from C_DATE) = 8 then 1 end) as aug,
   count(case when extract(month from C_DATE) = 9 then 1 end) as sep,
   count(case when extract(month from C_DATE) = 10 then 1 end) as oct,
   count(case when extract(month from C_DATE) = 11 then 1 end) as nov,
   count(case when extract(month from C_DATE) = 12 then 1 end) as december
from Table1

Currently That is the query i have which produces the result

Jan Feb Mar Apr .....
1   3    1   2

now i want to display this information in a line graph so it looks like this joined up

3       x
2
1  x           x
  jan   feb   mar 

Being abit of a noob with charts i cant get it to work when i try to use my current query. any help much appreciated

Answer 1

If you really want to go with ASCII graphics, and in lieu of something more elaborate, you could build on

WITH
Line AS (
  SELECT
    ' ' || Jan || '  ' || Feb || '  ' || Mar || '  ' || Apr || '  ' || May || '  ' || Jun || '  ' || Jul || '  ' || Aug || '  ' || Sep || '  ' || Oct || '  ' || Nov || '  ' || Dec || ' ' l
  FROM Result
),
Graph (cnt, g)AS (
  SELECT 5, '#' || REGEXP_REPLACE(REGEXP_REPLACE(l, ' 5 ', '  x  '), '\d+', '   ') || '#' FROM Line UNION ALL
  SELECT 4, '#' || REGEXP_REPLACE(REGEXP_REPLACE(l, ' 4 ', '  x  '), '\d+', '   ') || '#' FROM Line UNION ALL
  SELECT 3, '#' || REGEXP_REPLACE(REGEXP_REPLACE(l, ' 3 ', '  x  '), '\d+', '   ') || '#' FROM Line UNION ALL
  SELECT 2, '#' || REGEXP_REPLACE(REGEXP_REPLACE(l, ' 2 ', '  x  '), '\d+', '   ') || '#' FROM Line UNION ALL
  SELECT 1, '#' || REGEXP_REPLACE(REGEXP_REPLACE(l, ' 1 ', '  x  '), '\d+', '   ') || '#' FROM Line UNION ALL
  SELECT 0, '#' || REGEXP_REPLACE(REGEXP_REPLACE(l, ' 0 ', '  x  '), '\d+', '   ') || '#' FROM Line UNION ALL
  SELECT -1, '# Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec #' FROM DUAL
)
SELECT
  *
FROM Graph
ORDER BY cnt DESC
;

with "Result" being your query against Table1.

See SQL Fiddle (Switch to plain text output to see the columns properly aligned.)
Did you give Building Charts, Gantts and Maps with Oracle Application Express 4.0 a try? Please comment, if and as adjustment / further detail is required.