querying SQL Server 2005 - sql

Question

I have a table that is time and milemarkers:
08:00 101.2
08:45 109.8
09:15 109.8
09:30 111.0
10:00 114.6
I need output that looks like this:
08:00-08:45 101.1-109.8
08:45-09:15 109.8-109.8
09:15-09:30 109.8-111.0
09:30-10:00 111.0-114.6
I figure I need 2 identical recordsets and somehow tie the first record of one to the second record of the other, but am clueless on how to accomplish that (or how to ask the question). Any help would be greatly appreciated.
Thanks in advance,
Ginny

Answer 1

The following query will get the next values:
select tm.*,
(select top 1 time
from timemilemarkers tm2
where tm2.time > tm.time
order by 1 desc
) as nexttime,
(select top 1 milemarker
from timemilemarkers tm2
where tm2.time > tm.time
order by 1 desc
) as nextmilemarker
from timemilemarkers tm;
You can put them into the form you want with something like:
select concat_ws('-', milemarker, nextmilemarker), concat_ws('-', time, nexttime)
from (select tm.*,
(select top 1 time
from timemilemarkers tm2
where tm2.time > tm.time
order by 1 desc
) as nexttime,
(select top 1 milemarker
from timemilemarkers tm2
where tm2.time > tm.time
order by 1 desc
) as nextmilemarker
from timemilemarkers tm
) tm
where nextmilemarker is not null;

Answer 2

Other way to do it is:
SQLFiddle
select cast(A.TIME_COL as varchar) + ' - ' + cast(B.TIME_COL as varchar),
cast(A.MILES as varchar) + ' - ' + cast(B.MILES as varchar)
from (select row_number() OVER (order by time_col) ID, * from TABLE_A) A
inner join (select row_number() OVER (order by time_col) ID, * from TABLE_A) B
on A.ID = B.ID - 1
UPDATE: this query will only works for SQL Server 2008 and upwards and obviously not answer your question. I will not erase the answer cause it can be helpful for othe people.
UPDATE2: It works on SQL Server 2005.

Answer 3

try this,
Declare #t table (times time(0), milemarkers decimal(5,2))
insert into #t
select '08:00','101.2' union all
select'08:45','109.8' union all
select'09:15','109.8' union all
select'09:30','111.0' union all
select'10:00','114.6'
;With cte1 as
(select *,ROW_NUMBER()over(order by times)rn from #t
)
,cte2 as
(select max(rn) rn1 from cte1)
, cte as
(select
(select times from cte1 where rn=1)lowerlimit,(select times from cte1 where rn=2)upperlimit,
(select milemarkers from cte1 where rn=1)lowerlimit1,(select milemarkers from cte1 where rn=2)upperlimit1
,1 rn from cte1
union all
select upperlimit,(select times from cte1 where rn=a.rn+2)
,upperlimit1,(select milemarkers from cte1 where rn=a.rn+2)
,rn+1
from cte a where a.rn<(select rn1 from cte2)
)
select distinct cast(lowerlimit as varchar(10))+'-'+cast(upperlimit as varchar(10)) ,
cast(lowerlimit1 as varchar(10))+'-'+cast(upperlimit1 as varchar(10))
from cte a where a.rn<(select rn1 from cte2)

Answer 4

Using CTE we can get the OutPut it is also other way to do Find below query
DECLARE #TABLE_A table(time_col time, miles float)
insert into #TABLE_A values ('08:00',101.2)
insert into #TABLE_A values ('08:45',109.8)
insert into #TABLE_A values ('09:15',109.8)
insert into #TABLE_A values ('09:30',111.0)
insert into #TABLE_A values ('10:00',114.6)
;WITH CTE AS
(
SELECT t.time_col,t.miles,t.RN FROM
(
Select ROW_NUMBER()OVER(ORDER BY time_col )RN,* FRom #TABLE_A
)t
INNER JOIN (
Select ROW_NUMBER()OVER(ORDER BY time_col )RN,* FRom #TABLE_A
)tt
ON t.RN = tt.RN
)
,CTE2(TimeSpan,Miles) AS
(
Select CONVERT(VARCHAR,c.time_col,108) +'-'+
(Select CONVERT(VARCHAR,time_col,108) FROM CTE WHERE RN = cc.RN + 1) As TimeSpan,
CAST(c.miles AS VARCHAR) +' - '+ (Select CAST(miles AS VARCHAR) FROM CTE WHERE RN = CC.RN + 1)AS Miles FROM CTE c
INNER JOIN CTE CC
ON CC.miles = c.miles
AND CC.time_col = c.time_col
)
Select TimeSpan,Miles from CTE2
WHERE TimeSpan IS NOT NULL