August 27, 2012 at 6:06 pm
I have a data look like this -
Note: have to be breakdown per TNID field
TNID TN
3011170 4402787100
3011170 4402787101
3011170 4402787102
3011170 4402787103
3011171 4402787104
3011171 4402787105
3011175 4402787118
3011175 4402787119
3011175 4405165555
3011175 4405165556
3011175 4405165557
3011175 4405165558
3011175 4409447976
How to write a T-SQL that the output will in ranges -
TNID TN1 TN2
3011170 44027871004402787103
3011171 44027871044402787105
3011175 44027871184402787119
3011175 44051655554405165558
3011175 44094479764409447976
Thanks in advance.
August 27, 2012 at 6:52 pm
This should work in SQL 2000:
CREATE TABLE #Temp
(TNID INT, TN VARCHAR(20))
INSERT INTO #Temp
SELECT 3011170, '4402787100'
UNION ALL SELECT 3011170, '4402787101'
UNION ALL SELECT 3011170, '4402787102'
UNION ALL SELECT 3011170, '4402787103'
UNION ALL SELECT 3011171, '4402787104'
UNION ALL SELECT 3011171, '4402787105'
UNION ALL SELECT 3011175, '4402787118'
UNION ALL SELECT 3011175, '4402787119'
UNION ALL SELECT 3011175, '4405165555'
UNION ALL SELECT 3011175, '4405165556'
UNION ALL SELECT 3011175, '4405165557'
UNION ALL SELECT 3011175, '4405165558'
UNION ALL SELECT 3011175, '4409447976'
SELECT TNID, TNMIN=MIN(TN), TNMAX=MAX(TN)
FROM #Temp
GROUP BY TNID
DROP TABLE #Temp
My thought question: Have you ever been told that your query runs too fast?
My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
Since random numbers are too important to be left to chance, let's generate some![/url]
Learn to understand recursive CTEs by example.[/url]
[url url=http://www.sqlservercentral.com/articles/St
August 28, 2012 at 11:15 am
I tried your query but it came out like this. The 3rd row is not correct.
TNID TNMIN TNMAX
3011170 44027871004402787103
3011171 44027871044402787105
3011175 44027871184409447976
here's the missing recs:
TNID TN1 TN2
3011175 4402787118 4402787119
3011175 4405165555 4405165558
3011175 4409447976 4409447976
Thanks for trying :-). Anyone out there have other ideas.
August 28, 2012 at 11:20 am
Since the data depends on sequentiality, which isn't a property of relational data, you'll need a non-relational solution. That means a simple cursor.
Step through the rows, if the TN increments by more than 1, or the TNID changes to a new value, insert the new values into a temp table as the start-range value, and update the prior row of the temp table with the last value, as the end-of-range. Then select from the temp table.
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
Property of The Thread
"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
August 28, 2012 at 11:36 am
Here is my shot at the solution.
CREATE TABLE #Temp
(TNID INT, TN BIGINT);
INSERT INTO #Temp
SELECT 3011170, 4402787100
UNION ALL SELECT 3011170, 4402787101
UNION ALL SELECT 3011170, 4402787102
UNION ALL SELECT 3011170, 4402787103
UNION ALL SELECT 3011171, 4402787104
UNION ALL SELECT 3011171, 4402787105
UNION ALL SELECT 3011175, 4402787118
UNION ALL SELECT 3011175, 4402787119
UNION ALL SELECT 3011175, 4405165555
UNION ALL SELECT 3011175, 4405165556
UNION ALL SELECT 3011175, 4405165557
UNION ALL SELECT 3011175, 4405165558
UNION ALL SELECT 3011175, 4409447976;
with rCTE as (
select
row_number() over (order by (select null)) rn,
t1.TNID,
t1.TN
from
#Temp t1
left outer join #Temp t2
on t1.TNID = t2.TNID and t1.TN = t2.TN + 1
where
t2.TNID is null
union all
select
rn,
t1.TNID,
t1.TN
from
#Temp t1
inner join rCTE t2
on t1.TNID = t2.TNID and t1.TN = t2.TN + 1
)
select TNID, min(TN) TN1, max(TN) TN2 from rCTE group by rn, TNID order by rn,TNID;
go
drop table #Temp;
go
August 28, 2012 at 11:54 am
Lynn Pettis (8/28/2012)
Here is my shot at the solution.
CREATE TABLE #Temp
(TNID INT, TN BIGINT);
INSERT INTO #Temp
SELECT 3011170, 4402787100
UNION ALL SELECT 3011170, 4402787101
UNION ALL SELECT 3011170, 4402787102
UNION ALL SELECT 3011170, 4402787103
UNION ALL SELECT 3011171, 4402787104
UNION ALL SELECT 3011171, 4402787105
UNION ALL SELECT 3011175, 4402787118
UNION ALL SELECT 3011175, 4402787119
UNION ALL SELECT 3011175, 4405165555
UNION ALL SELECT 3011175, 4405165556
UNION ALL SELECT 3011175, 4405165557
UNION ALL SELECT 3011175, 4405165558
UNION ALL SELECT 3011175, 4409447976;
with rCTE as (
select
row_number() over (order by (select null)) rn,
t1.TNID,
t1.TN
from
#Temp t1
left outer join #Temp t2
on t1.TNID = t2.TNID and t1.TN = t2.TN + 1
where
t2.TNID is null
union all
select
rn,
t1.TNID,
t1.TN
from
#Temp t1
inner join rCTE t2
on t1.TNID = t2.TNID and t1.TN = t2.TN + 1
)
select TNID, min(TN) TN1, max(TN) TN2 from rCTE group by rn, TNID order by rn,TNID;
go
drop table #Temp;
go
You'll run into maxrecursion issues if the actual data has any significant size to it at all, with this solution.
- Gus "GSquared", RSVP, OODA, MAP, NMVP, FAQ, SAT, SQL, DNA, RNA, UOI, IOU, AM, PM, AD, BC, BCE, USA, UN, CF, ROFL, LOL, ETC
Property of The Thread
"Nobody knows the age of the human race, but everyone agrees it's old enough to know better." - Anon
August 28, 2012 at 12:06 pm
GSquared (8/28/2012)
Lynn Pettis (8/28/2012)
Here is my shot at the solution.
CREATE TABLE #Temp
(TNID INT, TN BIGINT);
INSERT INTO #Temp
SELECT 3011170, 4402787100
UNION ALL SELECT 3011170, 4402787101
UNION ALL SELECT 3011170, 4402787102
UNION ALL SELECT 3011170, 4402787103
UNION ALL SELECT 3011171, 4402787104
UNION ALL SELECT 3011171, 4402787105
UNION ALL SELECT 3011175, 4402787118
UNION ALL SELECT 3011175, 4402787119
UNION ALL SELECT 3011175, 4405165555
UNION ALL SELECT 3011175, 4405165556
UNION ALL SELECT 3011175, 4405165557
UNION ALL SELECT 3011175, 4405165558
UNION ALL SELECT 3011175, 4409447976;
with rCTE as (
select
row_number() over (order by (select null)) rn,
t1.TNID,
t1.TN
from
#Temp t1
left outer join #Temp t2
on t1.TNID = t2.TNID and t1.TN = t2.TN + 1
where
t2.TNID is null
union all
select
rn,
t1.TNID,
t1.TN
from
#Temp t1
inner join rCTE t2
on t1.TNID = t2.TNID and t1.TN = t2.TN + 1
)
select TNID, min(TN) TN1, max(TN) TN2 from rCTE group by rn, TNID order by rn,TNID;
go
drop table #Temp;
go
You'll run into maxrecursion issues if the actual data has any significant size to it at all, with this solution.
True, and I didn't ad the option to cap it either, but it was my first shot. I am looking at some other alternatives as well.
August 28, 2012 at 12:17 pm
Here is another option that appears to work for the given test data:
CREATE TABLE #Temp
(TNID INT, TN BIGINT);
INSERT INTO #Temp
SELECT 3011170, 4402787100
UNION ALL SELECT 3011170, 4402787101
UNION ALL SELECT 3011170, 4402787102
UNION ALL SELECT 3011170, 4402787103
UNION ALL SELECT 3011171, 4402787104
UNION ALL SELECT 3011171, 4402787105
UNION ALL SELECT 3011175, 4402787118
UNION ALL SELECT 3011175, 4402787119
UNION ALL SELECT 3011175, 4405165555
UNION ALL SELECT 3011175, 4405165556
UNION ALL SELECT 3011175, 4405165557
UNION ALL SELECT 3011175, 4405165558
UNION ALL SELECT 3011175, 4409447976;
with basedata as (
select
TNID,
TN,
TN - row_number() over (order by TNID, TN) as grp
from
#Temp
)
select
TNID,
min(TN) as TN1,
max(TN) as TN2
from
basedata
group by
grp, TNID
;
go
drop table #Temp;
go
August 28, 2012 at 12:24 pm
Lynn, your solutions are great :-D. But this is the 7,2000 forum 🙁
I wonder if that helps the OP.
August 28, 2012 at 12:25 pm
Now someone tells me! Time to hit the desk with my head.
August 28, 2012 at 12:34 pm
Anybody have a SQL Server 2000 instance? Please give this a try:
CREATE TABLE #Source
(TNID INT, TN BIGINT);
INSERT INTO #Source
SELECT 3011170, 4402787100
UNION ALL SELECT 3011170, 4402787101
UNION ALL SELECT 3011170, 4402787102
UNION ALL SELECT 3011170, 4402787103
UNION ALL SELECT 3011171, 4402787104
UNION ALL SELECT 3011171, 4402787105
UNION ALL SELECT 3011175, 4402787118
UNION ALL SELECT 3011175, 4402787119
UNION ALL SELECT 3011175, 4405165555
UNION ALL SELECT 3011175, 4405165556
UNION ALL SELECT 3011175, 4405165557
UNION ALL SELECT 3011175, 4405165558
UNION ALL SELECT 3011175, 4409447976;
select
identity(int,1,1) as RN,
TNID,
TN
into #Temp
from #Source
order by TNID, TN;
select
TNID,
min(TN) as TN1,
max(TN) as TN2
from
#Temp
group by
TN - RN, TNID;
go
drop table #Temp;
drop table #Source;
go
August 28, 2012 at 12:40 pm
Lynn,
I tried your second query and it works perfectly. Great work. Will I run to a maxrecursion with this too? What is the max data for the maxrecursion happens? I will be dealing with hundreds of thousand records.
August 28, 2012 at 12:44 pm
fsr645 (8/28/2012)
Lynn,I tried your second query and it works perfectly. Great work. Will I run to a maxrecursion with this too? What is the max data for the maxrecursion happens? I will be dealing with hundreds of thousand records.
First, what version of SQL Server are you using?
Second, if you are talking about the row_number version, there is no recursion so no problem.
August 28, 2012 at 12:51 pm
I'm using SQL 2008. I tried the 3rd version and it works too. Which version do you recommend the 2nd or 3rd one specially dealing hundreds of thousand records? Thanks.
August 28, 2012 at 12:53 pm
My last was a SQL Server 2000 version. Since you are using SQL Server 2008, I'd use the ROW_NUMBER() version (the 2nd).
Viewing 15 posts - 1 through 15 (of 20 total)
You must be logged in to reply to this topic. Login to reply