help with incrementing

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help with incrementing

is250sp

SSCarpal Tunnel

Points: 4361
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July 30, 2013 at 9:12 am

#278150

I am not sure if "incrementing" is the right word to describe what I need but here it goes. I am pulling data from a system to insert into another system. The source table has 2 fields that I will use to create logic to create a new unique field so that I can insert into the target table.
Source table:
VENDID TYPE
ABC 1
ABC 0
ABC 0
XYZ 1
XYZ 0
XYZ 0
XYZ 0
If TYPE = 1 then VENDID, else increment by 1 for each VENDID. For example, the results would be:
ABC
ABC-01
ABC-02
XYZ
XYZ-01
XYZ-02
XYZ-03
The only solution I have right now is output to Excel and do a Fill Series but that would forever.

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Sean Lange SSC Guru Points: 286590 More actions · Answer 1

It would be a LOT easier if you could post ddl and sample data.

if OBJECT_ID('tempdb..#Something') is not null

drop table #Something

create table #Something

(

VendID char(3),

Type int

)

insert #Something

select 'ABC', 1 union all

select 'ABC', 0 union all

select 'XYZ', 1 union all

select 'XYZ', 0 union all

select 'XYZ', 0;

Ok now that we have something start with let's look at how you could code this.

with NumberedVals as

(

select *, ROW_NUMBER() over(partition by VENDID, Type order by (select 0)) as RowNum

from #Something

)

select VendID, Type, case Type when 1 then VendID else VendID + '-0' + CAST(RowNum as varchar(4)) end

from NumberedVals

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Abu Dina SSChampion Points: 14155 More actions · Answer 2

Arggh Sean you beat me to it lol, anyhoo here is my attempt:

with SCC_CTE(VENDID, VENDTYPE)

as (select 'ABC', 1 union all

select 'ABC', 0 union all

select 'XYZ', 1 union all

select 'XYZ', 0 union all

select 'XYZ', 0)

select vendid,vendtype,

case when vendtype = 1 then vendid else VENDID + '-' + right('0'+theRank, 3) end

from (

select VENDID, VENDTYPE, cast(row_number() OVER (PARTITION BY VENDID, VENDTYPE ORDER BY VENDID) as varchar) as theRank

from scc_cte) as a

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

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ChrisM@Work SSC Guru Points: 186127 More actions · Answer 3

;WITH Source_table (VENDID, [TYPE]) AS

(SELECT 'ABC', 1 UNION ALL

SELECT 'ABC', 0 UNION ALL

SELECT 'XYZ', 1 UNION ALL

SELECT 'XYZ', 0 UNION ALL

SELECT 'XYZ', 0 )

SELECT

VENDID,

[TYPE],

NewVENDID = CASE

WHEN [TYPE] = 1 THEN VENDID

ELSE VENDID + '-' + RIGHT('00'+CAST(ROW_NUMBER() OVER(PARTITION BY VENDID, TYPE ORDER BY VENDID, TYPE) AS VARCHAR(2)),2) END

FROM Source_table

ORDER BY NewVENDID

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For fast, accurate and documented assistance in answering your questions, please read this article.
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is250sp SSCarpal Tunnel Points: 4361 More actions · Answer 4

Wow you guys are fast! Now I have to dissect the code to understand it. Thanks!

Dwain Camps SSC Guru Points: 86948 More actions · Answer 5

Here's another approach for your dissection table:

with SCC_CTE(VENDID, VENDTYPE)

as (select 'ABC', 1 union all

select 'ABC', 0 union all

select 'XYZ', 1 union all

select 'XYZ', 0 union all

select 'XYZ', 0)

SELECT ISNULL(

VENDID + '-' + RIGHT('00' +

CAST(

NULLIF(VENDTYPE,1)+ROW_NUMBER() OVER (PARTITION BY VENDID ORDER BY VENDTYPE DESC)-1

AS VARCHAR(2)), 2)

, VENDID)

FROM SCC_CTE;

My mantra: No loops! No CURSORs! No RBAR! Hoo-uh![/I]
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]
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ck9663 Right there with Babe Points: 763 More actions · Answer 6

How about something with no CTE nor subquery...

I'll borrow the population of test data...

if OBJECT_ID('tempdb..#Something') is not null

drop table #Something

create table #Something

(

VendID char(3),

Type int

)

insert #Something

select 'ABC', 1 union all

select 'ABC', 0 union all

select 'XYZ', 1 union all

select 'XYZ', 0 union all

select 'XYZ', 0;

Here's the code for your required output

select

vendid, type,

new_vendid = vendid + case when type = 1 then '' else '-' + right('0' + cast(row_number() over(partition by vendid order by vendid asc, type desc) - 1 as varchar(2)),2) end

from #something

Happy Coding!!!

~~ CKK

Dwain Camps SSC Guru Points: 86948 More actions · Answer 7

ck9663 (8/6/2013)
How about something with no CTE nor subquery...
...
~~ CKK

?? Mine has neither. The CTE is only there to put the sample data someplace.

My mantra: No loops! No CURSORs! No RBAR! Hoo-uh![/I]
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

Jeff Moden SSC Guru Points: 1004356 More actions · Answer 8

I wouldn't aadd the sequence number to the original data because it makes it more difficult to use criteria not to mention that it's a form of denormalization. The sequence number should go into a different column. If you absolutely need to append the sequence number to the original data, do it only at display time.

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

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