SQL SEVER 表master.dbo.spt_values 的用法


--统计某月份周情况 没有的补0

if object_id('temp_tb') is not null

drop table temp_tb

create table temp_tb

([ID] [numeric](18, 0) IDENTITY(1,1) NOT NULL,

[test_values] int NULL,

[time] datetime null,

);

go

insert into temp_tb([test_values],[time])

select 3,'2009-2-1 10:12:30' union all

select 5,'2009-2-5 09:20:23' union all

select 6,'2009-2-6 11:21:34' union all

select 7,'2009-2-8 12:22:12' union all

select 2,'2009-2-10 16:45:25' union all

select 3,'2009-2-13 13:21:14' union all

select 5,'2009-2-15 15:58:09' union all

select 1,'2009-2-15 08:35:47' union all

select 1,'2009-2-15 09:13:07' union all

select 9,'2009-2-15 09:15:04'

select * from temp_tb

SELECT

A.[Week],

ISNULL(COUNT(B.test_values),0) AS num

FROM (

SELECT

datepart(week,dateadd(week,0,dateadd(day,number,'2009-02-01'))) AS [Week]

FROM master.dbo.spt_values

WHERE type='p' AND number BETWEEN 0 AND 27

GROUP BY datepart(week,dateadd(week,0,dateadd(day,number,'2009-02-01')))

) AS A

LEFT JOIN temp_tb AS B

ON A.[Week]=DATEPART(week,time)

GROUP BY A.[Week]

SELECT DATEPART(WEEK,'2009-10-30 12:15:32.1234567 +05:10') --44周

/*

ID test_values time

--------------------------------------- ----------- -----------------------

1 3 2009-02-01 10:12:30.000

2 5 2009-02-05 09:20:23.000

3 6 2009-02-06 11:21:34.000

4 7 2009-02-08 12:22:12.000

5 2 2009-02-10 16:45:25.000

6 3 2009-02-13 13:21:14.000

7 5 2009-02-15 15:58:09.000

8 1 2009-02-15 08:35:47.000

9 1 2009-02-15 09:13:07.000

10 9 2009-02-15 09:15:04.000

(10 行受影响)

Week num

----------- -----------

6 3

7 3

8 4

9 0

*/

--1、得出一天的时间段记录。

select 时间段=ltrim(a.number)+':00-'+ltrim(b.number)+':00'

from master..spt_values a,master..spt_values b

where a.type='p'and b.type='p'

and a.number between 1 and 24

and b.number between 1 and 24

and a.number=b.number-1

/*

时间段

-------------------------------

1:00-2:00

2:00-3:00

3:00-4:00

4:00-5:00

5:00-6:00

6:00-7:00

7:00-8:00

8:00-9:00

9:00-10:00

10:00-11:00

11:00-12:00

12:00-13:00

13:00-14:00

14:00-15:00

15:00-16:00

16:00-17:00

17:00-18:00

18:00-19:00

19:00-20:00

20:00-21:00

21:00-22:00

22:00-23:00

23:00-24:00

(23 行受影响)

*/

--2、通过1个select语句某个月的所有日期记录

declare @date datetime

set @date='2009-11-23'

select [day]=ltrim(year(@date))+right(100+month(@date),2)+right('0'+ltrim(number),2)

from master..spt_values

where type='p'

and number >=1

and number <= datediff(dd,@date,dateadd(month,1,@date))

/*

day

--------------------

20091101

20091102

20091103

20091104

20091105

20091106

20091107

20091108

20091109

20091110

20091111

20091112

20091113

20091114

20091115

20091116

20091117

20091118

20091119

20091120

20091121

20091122

20091123

20091124

20091125

20091126

20091127

20091128

20091129

20091130

(30 行受影响)

*/