Saya akan menggunakan prosedur tersimpan ini untuk menghasilkan interval yang Anda butuhkan ke dalam tabel temp bernama time_intervals , kemudian BERGABUNG dan menggabungkan tabel data Anda dengan tabel interval_waktu temp .
Prosedur dapat menghasilkan interval dari semua tipe berbeda yang Anda lihat ditentukan di dalamnya:
call make_intervals('2009-01-01 00:00:00','2009-01-10 00:00:00',1,'DAY')
.
select * from time_intervals
.
interval_start interval_end
2009-01-01 00:00:00 2009-01-01 23:59:59
2009-01-02 00:00:00 2009-01-02 23:59:59
2009-01-03 00:00:00 2009-01-03 23:59:59
2009-01-04 00:00:00 2009-01-04 23:59:59
2009-01-05 00:00:00 2009-01-05 23:59:59
2009-01-06 00:00:00 2009-01-06 23:59:59
2009-01-07 00:00:00 2009-01-07 23:59:59
2009-01-08 00:00:00 2009-01-08 23:59:59
2009-01-09 00:00:00 2009-01-09 23:59:59
.
call make_intervals('2009-01-01 00:00:00','2009-01-01 02:00:00',10,'MINUTE')
.
select * from time_intervals
.
interval_start interval_end
2009-01-01 00:00:00 2009-01-01 00:09:59
2009-01-01 00:10:00 2009-01-01 00:19:59
2009-01-01 00:20:00 2009-01-01 00:29:59
2009-01-01 00:30:00 2009-01-01 00:39:59
2009-01-01 00:40:00 2009-01-01 00:49:59
2009-01-01 00:50:00 2009-01-01 00:59:59
2009-01-01 01:00:00 2009-01-01 01:09:59
2009-01-01 01:10:00 2009-01-01 01:19:59
2009-01-01 01:20:00 2009-01-01 01:29:59
2009-01-01 01:30:00 2009-01-01 01:39:59
2009-01-01 01:40:00 2009-01-01 01:49:59
2009-01-01 01:50:00 2009-01-01 01:59:59
.
I specified an interval_start and interval_end so you can aggregate the
data timestamps with a "between interval_start and interval_end" type of JOIN.
.
Code for the proc:
.
.
CREATE PROCEDURE make_intervals(startdate timestamp, enddate timestamp, intval integer, unitval varchar(10))
BEGIN
declare thisDate timestamp;
declare nextDate timestamp;
set thisDate = startdate;
drop temporary table if exists time_intervals;
create temporary table if not exists time_intervals
(
interval_start timestamp,
interval_end timestamp
);
repeat
select
case unitval
when 'MICROSECOND' then timestampadd(MICROSECOND, intval, thisDate)
when 'SECOND' then timestampadd(SECOND, intval, thisDate)
when 'MINUTE' then timestampadd(MINUTE, intval, thisDate)
when 'HOUR' then timestampadd(HOUR, intval, thisDate)
when 'DAY' then timestampadd(DAY, intval, thisDate)
when 'WEEK' then timestampadd(WEEK, intval, thisDate)
when 'MONTH' then timestampadd(MONTH, intval, thisDate)
when 'QUARTER' then timestampadd(QUARTER, intval, thisDate)
when 'YEAR' then timestampadd(YEAR, intval, thisDate)
end into nextDate;
insert into time_intervals select thisDate, timestampadd(MICROSECOND, -1, nextDate);
set thisDate = nextDate;
until thisDate >= enddate
end repeat;
END;
Contoh skenario data serupa di bagian bawah posting ini , di mana saya membangun fungsi serupa untuk SQL Server.