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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