How to calculate the limits of dynamic range based on a value
Hi all, I need to create a function that accepts as parameters:Ticket_id NUMBER
NUMBER fluctuation
Resolution_time NUMBER
For each Ticket_id, the function should calculate the Resolution_time who "go time" according to the Fluctuation_ratio.
For example:
Ticket_id = 12
Fluctuation_ratio = 0.5
Resolution_time = 1.6 (hours)
The fluctuation_ratio said that the range increased by 0.5 hours each time. So in this example, it must consider lines like these:
"0-0, 5 h'"
"0,5- 1 h"
1 to 1.5 h'
'1.5 to 2 h'
..........
So the function must return the string: * "1.5 to 2 h."
If the fluctuation_ratio was 3, the lines had to be:
"' 0 - 3 hours"
3 6 h"
6 9 h'
9 12 h'
..........
and the function should return the string: *'0 - 3: "*"
Anyone know how I can achieve this? Is there an analytic function which calculate each time the lower and the upper limit of the range 'hour '?
Thanks in advance, any help will be appreciated
Alex
Hello
Here's a function that does what you requested:
CREATE OR REPLACE FUNCTION resolution_range
( in_fluctuation IN NUMBER
, in_resolution IN NUMBER
)
RETURN VARCHAR2
DETERMINISTIC
IS
low_val NUMBER := in_fluctuation * FLOOR ( in_resolution
/ NULLIF (in_fluctuation, 0)
);
return_txt VARCHAR2 (4000) := TO_CHAR (low_val)
|| '-'
|| TO_CHAR (low_val + in_fluctuation)
|| 'h';
BEGIN
RETURN return_txt;
END resolution_range
;
I tested it using this query:
WITH test_data AS
(
SELECT 12 AS ticket_id, .5 AS fluctuation_ratio, 1.6 AS resolution_time FROM dual UNION ALL
SELECT 13, 3, 1.6 FROM dual
)
SELECT test_data.*
, resolution_range (fluctuation_ratio, resolution_time) AS range
FROM test_data
;
and got this output:
TICKET_ID FLUCTUATION_RATIO RESOLUTION_TIME RANGE
--------- ----------------- --------------- --------------------
12 .5 1.6 1.5-2h
13 3 1.6 0-3h
Tags: Database
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