最近，在论坛中，遇到了不少比较难的sql问题，虽然自己都能解决，但发现过几天后，就记不起来了，也忘记解决的方法了。
所以，觉得有必要记录下来，这样以后再次碰到这类问题，也能从中获取解答的思路。
1、请问我这样的需求如何实现，看示很简单的问题，实现起来很复杂吗？
现在是这样的问题了
USE tempdb
IF OBJECT_ID('TEST') IS NOT NULL
DROP TABLE TEST; --> 如果表TEST不为空,删除表
GO
CREATE TABLE TEST --> 创建表,字段及类型如下
(
CalID varchar(20), --> 编号
CalDate datetime, --> 日期字段
CalStime datetime, --> 时间字段
CalEtime datetime, --> 机器号
CalBZ varchar(10) --> 这是机器要求的时间间隔字段，单位分钟
);
GO
INSERT TEST --> 向表中插入数据
select 'A01','2011-03-13 00:00:00.000','00:00:00.000','06:59:00.000','丙' union all
select 'A01','2011-03-13 00:00:00.000','07:00:00.000','14:59:00.000','甲' union all
select 'A01','2011-03-13 00:00:00.000','15:00:00.000','21:59:00.000','乙' union all
select 'A01','2011-03-13 00:00:00.000','22:00:00.000','23:59:00.000','丁'
GO
SELECT * FROM TEST; --> 表的结构如下
GO
/*
CalID CalDate CalStime CalEtime CalBZ
-------------------- ------------------------------------------------------ ------------------------------------------------------ ------------------------------------------------------ ----------
A01 2011-03-13 00:00:00.000 1900-01-01 00:00:00.000 1900-01-01 06:59:00.000 丙
A01 2011-03-13 00:00:00.000 1900-01-01 07:00:00.000 1900-01-01 14:59:00.000 甲
A01 2011-03-13 00:00:00.000 1900-01-01 15:00:00.000 1900-01-01 21:59:00.000 乙
A01 2011-03-13 00:00:00.000 1900-01-01 22:00:00.000 1900-01-01 23:59:00.000 丁
*/
--怎么得到以下结果？
/*
A01 2011-03-13 00:00 2011-03-13 00:29 丙
A01 2011-03-13 00:30 2011-03-13 00:59 丙
A01 2011-03-13 01:00 2011-03-13 01:29 丙
A01 2011-03-13 01:30 2011-03-13 01:59 丙
.....以此类推
A01 2011-03-13 23:00 2011-03-13 23:29 丁
A01 2011-03-13 23:30 2011-03-13 23:59 丁
*/
简单的说，就是如何把表中一个时间范围分段成若干个小时间段？在sql server 2000系统中。
我的方法：
select CalID,
DATEADD(minute,30*number,cal_stime) calStime,
DATEADD(minute,30*(number+1)-1,cal_stime) calEtime,
--Cal_Stime,
--Cal_Etime,
--number,
CalBZ
from
(
select *,
convert(varchar(11),CalDate,120)+CONVERT(varchar(5),CalStime,108) Cal_Stime,
convert(varchar(11),CalDate,120)+CONVERT(varchar(5),CalEtime,108) Cal_Etime
from TEST
)t,master..spt_values s
where s.type = 'P'
and s.number >=0
and DATEADD(MINUTE,30*number,Cal_Stime) <=Cal_Etime
/*
CalID calStime calEtime CalBZ
A01 2011-03-13 00:00:00.000 2011-03-13 00:29:00.000 丙
A01 2011-03-13 00:30:00.000 2011-03-13 00:59:00.000 丙
A01 2011-03-13 01:00:00.000 2011-03-13 01:29:00.000 丙
A01 2011-03-13 01:30:00.000 2011-03-13 01:59:00.000 丙
A01 2011-03-13 02:00:00.000 2011-03-13 02:29:00.000 丙
A01 2011-03-13 02:30:00.000 2011-03-13 02:59:00.000 丙
A01 2011-03-13 03:00:00.000 2011-03-13 03:29:00.000 丙
A01 2011-03-13 03:30:00.000 2011-03-13 03:59:00.000 丙
A01 2011-03-13 04:00:00.000 2011-03-13 04:29:00.000 丙
A01 2011-03-13 04:30:00.000 2011-03-13 04:59:00.000 丙
A01 2011-03-13 05:00:00.000 2011-03-13 05:29:00.000 丙
A01 2011-03-13 05:30:00.000 2011-03-13 05:59:00.000 丙
A01 2011-03-13 06:00:00.000 2011-03-13 06:29:00.000 丙
A01 2011-03-13 06:30:00.000 2011-03-13 06:59:00.000 丙
A01 2011-03-13 07:00:00.000 2011-03-13 07:29:00.000 甲
A01 2011-03-13 07:30:00.000 2011-03-13 07:59:00.000 甲
A01 2011-03-13 08:00:00.000 2011-03-13 08:29:00.000 甲
A01 2011-03-13 08:30:00.000 2011-03-13 08:59:00.000 甲
A01 2011-03-13 09:00:00.000 2011-03-13 09:29:00.000 甲
A01 2011-03-13 09:30:00.000 2011-03-13 09:59:00.000 甲
A01 2011-03-13 10:00:00.000 2011-03-13 10:29:00.000 甲
A01 2011-03-13 10:30:00.000 2011-03-13 10:59:00.000 甲
A01 2011-03-13 11:00:00.000 2011-03-13 11:29:00.000 甲
A01 2011-03-13 11:30:00.000 2011-03-13 11:59:00.000 甲
A01 2011-03-13 12:00:00.000 2011-03-13 12:29:00.000 甲
A01 2011-03-13 12:30:00.000 2011-03-13 12:59:00.000 甲
A01 2011-03-13 13:00:00.000 2011-03-13 13:29:00.000 甲
A01 2011-03-13 13:30:00.000 2011-03-13 13:59:00.000 甲
A01 2011-03-13 14:00:00.000 2011-03-13 14:29:00.000 甲
A01 2011-03-13 14:30:00.000 2011-03-13 14:59:00.000 甲
A01 2011-03-13 15:00:00.000 2011-03-13 15:29:00.000 乙
A01 2011-03-13 15:30:00.000 2011-03-13 15:59:00.000 乙
A01 2011-03-13 16:00:00.000 2011-03-13 16:29:00.000 乙
A01 2011-03-13 16:30:00.000 2011-03-13 16:59:00.000 乙
A01 2011-03-13 17:00:00.000 2011-03-13 17:29:00.000 乙
A01 2011-03-13 17:30:00.000 2011-03-13 17:59:00.000 乙
A01 2011-03-13 18:00:00.000 2011-03-13 18:29:00.000 乙
A01 2011-03-13 18:30:00.000 2011-03-13 18:59:00.000 乙
A01 2011-03-13 19:00:00.000 2011-03-13 19:29:00.000 乙
A01 2011-03-13 19:30:00.000 2011-03-13 19:59:00.000 乙
A01 2011-03-13 20:00:00.000 2011-03-13 20:29:00.000 乙
A01 2011-03-13 20:30:00.000 2011-03-13 20:59:00.000 乙
A01 2011-03-13 21:00:00.000 2011-03-13 21:29:00.000 乙
A01 2011-03-13 21:30:00.000 2011-03-13 21:59:00.000 乙
A01 2011-03-13 22:00:00.000 2011-03-13 22:29:00.000 丁
A01 2011-03-13 22:30:00.000 2011-03-13 22:59:00.000 丁
A01 2011-03-13 23:00:00.000 2011-03-13 23:29:00.000 丁
A01 2011-03-13 23:30:00.000 2011-03-13 23:59:00.000 丁
*/
2、如何取0点开始至今的时间段集合, 间隔1小时
http://bbs.csdn.net/topics/390706187
如题：如何取0点开始至今的时间段集合, 间隔1小时
0：00 - 1：00
1：00 - 2：00
...
23：00 - 0：00
下面的代码产生的是纯时间段，不过不好用：
select convert(varchar(10),getdate(),120) '当天日期',
convert(varchar(5),dateadd(hour,s.number,convert(varchar(10),getdate(),120)),108)+'-'+
convert(varchar(5),dateadd(hour,s.number+1,convert(varchar(10),getdate(),120)),108) '时间段'
from master..spt_values s
where s.type = 'P' and s.number <= 23
/*
当天日期 时间段
2014-02-11 00:00-01:00
2014-02-11 01:00-02:00
2014-02-11 02:00-03:00
2014-02-11 03:00-04:00
2014-02-11 04:00-05:00
2014-02-11 05:00-06:00
2014-02-11 06:00-07:00
2014-02-11 07:00-08:00
2014-02-11 08:00-09:00
2014-02-11 09:00-10:00
2014-02-11 10:00-11:00
2014-02-11 11:00-12:00
2014-02-11 12:00-13:00
2014-02-11 13:00-14:00
2014-02-11 14:00-15:00
2014-02-11 15:00-16:00
2014-02-11 16:00-17:00
2014-02-11 17:00-18:00
2014-02-11 18:00-19:00
2014-02-11 19:00-20:00
2014-02-11 20:00-21:00
2014-02-11 21:00-22:00
2014-02-11 22:00-23:00
2014-02-11 23:00-00:00
*/
这个是产生日期时间段，比较实用：
if OBJECT_ID('tempdb..#seTable') is not null
drop table #seTable
create table #seTable(starTime nvarchar(40),endTime nvarchar(40))
insert into #seTable
select --convert(varchar(10),getdate(),120) curr_date,
convert(nvarchar(19),dateadd(hour,s.number,convert(varchar(10),getdate(),120)),120) start_date,
convert(nvarchar(19),dateadd(hour,s.number+1,convert(varchar(10),getdate(),120)),120) end_date
from master..spt_values s
where s.type = 'P' and s.number <= 23
select *
from #seTable
/*
starTime endTime
2014-02-11 00:00:00 2014-02-11 01:00:00
2014-02-11 01:00:00 2014-02-11 02:00:00
2014-02-11 02:00:00 2014-02-11 03:00:00
2014-02-11 03:00:00 2014-02-11 04:00:00
2014-02-11 04:00:00 2014-02-11 05:00:00
2014-02-11 05:00:00 2014-02-11 06:00:00
2014-02-11 06:00:00 2014-02-11 07:00:00
2014-02-11 07:00:00 2014-02-11 08:00:00
2014-02-11 08:00:00 2014-02-11 09:00:00
2014-02-11 09:00:00 2014-02-11 10:00:00
2014-02-11 10:00:00 2014-02-11 11:00:00
2014-02-11 11:00:00 2014-02-11 12:00:00
2014-02-11 12:00:00 2014-02-11 13:00:00
2014-02-11 13:00:00 2014-02-11 14:00:00
2014-02-11 14:00:00 2014-02-11 15:00:00
2014-02-11 15:00:00 2014-02-11 16:00:00
2014-02-11 16:00:00 2014-02-11 17:00:00
2014-02-11 17:00:00 2014-02-11 18:00:00
2014-02-11 18:00:00 2014-02-11 19:00:00
2014-02-11 19:00:00 2014-02-11 20:00:00
2014-02-11 20:00:00 2014-02-11 21:00:00
2014-02-11 21:00:00 2014-02-11 22:00:00
2014-02-11 22:00:00 2014-02-11 23:00:00
2014-02-11 23:00:00 2014-02-12 00:00:00
*/