Get every hour for a time range - sql

Question

So what I am trying to is generate all the hours that are inside a specific time range.
So given the range 11 AM to 2:00 PM, I would get:
11:00 AM
12:00 PM
1:00 PM
2:00 PM
I am trying to avoid having to store every specific hour a store might be open and just store the range (I need to compare the hours against other times)
Thanks

Answer 1

No loops, recursive CTEs or numbers table required.
DECLARE
#start TIME(0) = '11:00 AM',
#end TIME(0) = '2:00 PM';
WITH x(n) AS
(
SELECT TOP (DATEDIFF(HOUR, #start, #end) + 1)
rn = ROW_NUMBER() OVER (ORDER BY [object_id])
FROM sys.all_columns ORDER BY [object_id]
)
SELECT t = DATEADD(HOUR, n-1, #start) FROM x ORDER BY t;

Answer 2

You could use a recursive CTE. This would generate the hours between 11 and 14:
;with Hours as
(
select 11 as hr
union all
select hr + 1
from Hours
where hr < 14
)
select *
from Hours
Live example at SQL Fiddle.

Answer 3

If you have a numbers table (click the link to create one if you don't)...
create table test(
startTime time
, endTime time
)
insert into test
select '11:00', '14:00'
select
dateadd(hh, n.n, t.startTime) as times
from test t
inner join Numbers n
-- assuming your numbers start at 1 rather than 0
on n.n-1 <= datediff(hh, t.startTime, t.endTime)
If this is specialized, you can create an hours table with just 24 values.
create table HoursInADay(
[hours] time not null
, constraint PK_HoursInADay primary key ([hours])
)
-- insert
insert into HoursInADay select '1:00'
insert into HoursInADay select '2:00'
insert into HoursInADay select '3:00'
insert into HoursInADay select '4:00'
insert into HoursInADay select '5:00'
insert into HoursInADay select '6:00'
insert into HoursInADay select '7:00'
...
select
h.[hours]
from test t
inner join HoursInADay h
on h.[hours] between t.startTime and t.endTime

Answer 4

The easiest way I can think of to do this is to have only 1 permanent table with a list of all hours; 24 entries total.
Create table dbo.Hours (Hourly_Time Time NOT NULL)
Insert into dbo.Hours ...
Then, given times A & B:
select * from dbo.Hours where Hourly_Time<=A and Hourly_Time>=B

Answer 5

#Andomar Thanks a lot, you helped me, there is my add above your code.
*----------------------------
create view vw_hoursalot as
with Hours as
(
select DATEADD(
dd, 0, DATEDIFF(
dd, 0, DATEADD (
year , -5 , getDate()
)
)
) as dtHr
union all
select DATEADD (minute , 30 , dtHr )
from Hours
where dtHr < DATEADD(
dd, 0, DATEDIFF(
dd, 0, DATEADD (
year , +5 , getDate()
)
)
)
)
select * from Hours
----------------------------
select * from vw_hoursalot option (maxrecursion 0)
----------------------------*