Calculate the interval in days
Hi all!I need your help.
I have an oracle sql table.
This is going to...
TABLENAME: RACE
DATE NAME
JANUARY 11, 12 JAMES
JAMES JANUARY 12, 12
JAMES JANUARY 14, 12
JAMES JANUARY 17, 12
JAMES 22 JANUARY 12
1 FEBRUARY 12 JOHN
FEBRUARY 11, 12 JOHN
JOHN 13 FEBRUARY 12
JOHN 14 FEBRUARY 12
28 FEBRUARY 12 JOHN
JOHN 1ST MARCH 12
HOW can I calculate the date total interval (difference) for James and John in days?
for example in this case total is 7 days for James (January 11, 12 to 12 January 12 is 0 days and 12 January 12 to January 14, 12 is 1 day and 14 January 12 to 17 January 12 is 2 days) and 24 days for John
Data for the date will be random and can be up to names and dates of difference 60 so I would like to calculate all the names of different... Thank you!
Is there anyway that I can query without listing all the date?
Yes, just use the lower part of the "Real application" comment, that is:
select max(dt)-min(dt)-count(*)+1 diff
, nm
from race
group by nm;
I used the WITH only clause to generate some testdata...
Tags: Database
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the link is on MOSC, not OTN... Here's a copy:
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I give an example of table 'public_holiday' with sample data, but users must ensure that their table contains the relevant data (all holidays within the maximum range of use of the service)
CREATE TABLE public_holiday (calendar_day, DATE, text VARCHAR2 (30));
FUNCTION to CREATE or REPLACE nb_days (p_date_from IN DATE
p_date_to DATE by DEFAULT TRUNC (sysdate)
, p_public_holidays in CHAR DEFAULT 'Y '.
) RETURN NUMBER
DEFINE AUTHID
AS
/*********************************************************************/
/ * Author: Bruno Vroman * /.
/ * Created: 23-AUG-2012 * /.
/ * Last updated: 23-AUG-2012 * /.
/ * Object: to calculate the number of days between 2 dates, to the exclusion of * /.
/ * Saturday and Sunday, but also "holidays" If the * /.
/ * argument 'p_public_holidays' = 'Y ' * /.
/ * Support: p_date_from<= p_date_to ="">=>
/ * component ' hour min dry "ignored (just counting days) * /.
/* First step: */
/ * the calendar days between 2 days * /.
/ Remove 2 days for each "week" and 0 or 1 extra day * /.
/ * function to a condition "complex" mix day of first week * /.
/ * and the number of days when full remaining weeks are removed * /.
/ * (set up once for all, for example if there is 3 days and the * /)
(/ * first day is a Thursday, there is 1 "Sat/Sun" to subtract) * /.
/ * Second step: If 'p_public_holidays' = 'Y': other * /.
/ * days, do not count holidays. */
/ Holiday everyday are defined in a table "public_holiday" * /.
/ * Note: there may be holidays defined on Saturday/Sunday. */
/*********************************************************************/
l_result NUMBER;
l_from DATE;
l_to DATE;
l_case tank (4);
BEGIN
l_from: = TRUNC (p_date_from);
l_to: = TRUNC (p_date_to);
l_case: = TO_CHAR (l_from, 'Dy', 'NLS_DATE_LANGUAGE = English').
To_char (MOD (l_to - l_from + 1, 7));
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, "Sat1", "Sun1", "Sun2', 'Sun3", "Sun4".
, "Sun5', 'Sun6.
)
THEN 1
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, 'Thu6', 'Fri3', 'Fri4', 'Fri5', 'Fri6 '.
, "Sat2", "Sat3', 'Sat4', 'Sat5", "Sat6.
)
THEN 2
0 OTHERWISE
END
;
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THEN
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IN l_result
OF public_holiday p
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, "Dy".
'NLS_DATE_LANGUAGE = English'
)
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;
END IF;
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EXCEPTION
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THEN
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To_char (p_date_from, "MON-DD-YYYY"). ', ' ||
To_char (p_date_to, "MON-DD-YYYY"). ', ' ||
p_public_holidays | ' ) : ' || SQLERRM
);
LIFT;
END nb_days;
/
REM
REM example:
REM A) fill out the 'public_holidays '.
REM
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REM nb1: remove only Sat/Sun
REM nb2: also remove holidays
REM
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------------- ------------- ---- ----
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Best regards
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else 'work '.
end dat_type
sum (case when to_char(dat_val,'mm-dd') in (12-25', 12-26', ' 01-01'))
then 0
When to_char (dat_val, 'Dy') in ('Friday', 'Saturday')
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1 other
end
) on working_count (dat_val control)
from (select date "' 2015-12-01 + level - 1 dat_val)
of the double
connect by level<=>=>
)
)
Select dat_val,
dat_type,
working_count
calendar
where dat_val between to_date(:lo_date,'yyyymmdd') and to_date(:hi_date,'yyyymmdd')
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dat_val,
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Etbin
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