Want to add Text data

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Want to add Text data

niladri.primalink

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Points: 1751
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September 19, 2013 at 2:49 am

#395516

Hi All,
I have table called T1 where the data is populated like below
LineNumber errortext Fileid
1 a 10
1 b 10
2 a 11
2 b 11
2 c 11
3 c 12
3 d 12
Now I have a table called t2 with same structure. Now I want to insert the records into t2 table and the data should be coming from T1 table. where the id is same it will take one id and one linenumber and concatenate of errortext field. My output will be like below
LineNumber errortext Fileid
1 a,b 10
2 a,b,c 11
3 c,d 12
File id should be taken once and then distinct of linenumber field and then concatenate of errortext field.
Thanks in advance for your help!!

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Mark Fitzgerald-331224 SSCrazy Eights Points: 8489 More actions · Answer 1

Quick and dirty solution which would not scale that well but works as below. You may want to investigate

CLR concatenate aggregate[/url]

declare @a table (Linenumber int, ErrorText varchar(30),FileID int)

insert into @a values

(1, 'a', 10),

(1, 'b', 10),

(2, 'a', 11),

(2, 'b', 11),

(2, 'c', 11),

(3, 'c', 12),

(3, 'd', 12)

select * from @a

declare @FileID int, @LineNumber int

declare FileIDCursor cursor for select distinct FileID, LineNumber from @a

declare @AggResult table (LineNumber int, ErrorText varchar(1000), FileID int)

open FileIDCursor

fetch next from FileIDCursor into @FileID, @LineNumber

while @@FETCH_STATUS = 0

begin

declare @Concat varchar(1000) = ''

select @Concat = @Concat + ErrorText + ','

from @a

where FileID = @FileID and linenumber = @LineNumber

insert into @AggResult

select @LineNumber, left(@Concat,len(@Concat)-1), @FileID

fetch next from FileIDCursor into @FileID, @LineNumber

end

close FileIDCursor

deallocate FileIDCursor

select * from @AggResult

Fitz

John Mitchell-245523 SSC Guru Points: 148809 More actions · Answer 2

Have a look at this blog[/url]. It's got several different options for concatenating.

John

niladri.primalink SSCommitted Points: 1751 More actions · Answer 3

niladri.primalink

SSCommitted

Points: 1751

September 19, 2013 at 5:41 am

#1651459

Thanks guys for your input

It is working awesome!!

Sean Lange SSC Guru Points: 286590 More actions · Answer 4

There is no need to resort to looping for this. You can instead use STUFF.

Thanks Mark for the ddl and sample data.

declare @a table (Linenumber int, ErrorText varchar(30),FileID int)

insert into @a values

(1, 'a', 10),

(1, 'b', 10),

(2, 'a', 11),

(2, 'b', 11),

(2, 'c', 11),

(3, 'c', 12),

(3, 'd', 12)

select Linenumber,

STUFF((select ',' + ErrorText

from @a a2

where a1.Linenumber = a2.Linenumber

order by a2.ErrorText

for xml path('')), 1, 1, '') as ErrorTexts

, FileID

from @a a1

group by Linenumber, FileID

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Jeff Moden SSC Guru Points: 1004414 More actions · Answer 5

niladri.primalink (9/19/2013)
Thanks guys for your input
It is working awesome!!

"It"? What is "It"? What did you end up using? Please post the code that you ended up using.

--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.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

niladri.primalink SSCommitted Points: 1751 More actions · Answer 6

Sorry For using the word 'it'.

Actually the code what SScrazy sent to me is working for me.

That's why I wrote it is working for me.

If I hurt you then it is in my unbeknown.

John Mitchell-245523 SSC Guru Points: 148809 More actions · Answer 7

I think what Jeff is getting at, and I agree, is that you shouldn't necessary use the first solution you're given. Mark himself admitted that it's "quick and dirty" and that it won't work very well once your table starts to grow; he even suggested another method. I linked to an article that shows you half a dozen or so ways of doing it. I recommend you evaluate them all to see which works best. Yes, it's more work for you now, but it'll pay in terms of future performance and and of how well prepared you'll be next time you have to implement something like this.

John

Jeff Moden SSC Guru Points: 1004414 More actions · Answer 8

niladri.primalink (9/20/2013)
Sorry For using the word 'it'.
Actually the code what SScrazy sent to me is working for me.
That's why I wrote it is working for me.
If I hurt you then it is in my unbeknown.

Thank you for the concern but you didn't hurt me. I'm more concerned about what you ended up using because While Loops and cursors can be quite slow. That's why I wanted to know what you ended up using.

My recommendation would be to have a look at the code that Sean wrote for this. With apologies to Mark, Sean's code will run much more quickly.

--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.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)