摇曳的蔷薇
我将使用这个存储过程将所需的时间间隔生成到名为时间间隔，然后使用temp连接和聚合数据表。时间间隔桌子。该过程可以生成在其中指定的所有不同类型的间隔：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_i
ntervals('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 2009-01-0
1 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_st
art 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:.-- drop procedure make_intervals.CREATE
PROCEDURE make_intervals(startdate timestamp, enddate timestamp, intval integer, unitval varchar(10))
BEGIN-- *************************************************************************-- Procedure: make_intervals()--
Author: Ron Savage-- Date: 02/03/2009---- Description:-- This procedure creates a temporary table named time_intervals
with the-- interval_start and interval_end fields specifed from the startdate and-- enddate arguments, at intervals of intval (un
itval) size.-- *************************************************************************
declare thisDate timestamp;
declare nextDate timestamp;
set thisDate = startdate;
-- *************************************************************************
-- Drop / create the temp table
-- *************************************************************************
drop temporary table if exists time_intervals;
create temporary table if not exists time_intervals (
interval_start timestamp,
interval_end timestamp );
-- *************************************************************************
-- Loop through the startdate adding each intval interval until enddate
-- *************************************************************************
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;的底部有类似的示例数据场景。这个职位，其中我为SQLServer构建了一个类似的函数。