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extact last 3 characters from a string


extact last 3 characters from a string

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J-F Bergeron
J-F Bergeron
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Does this help?

DECLARE @str NVARCHAR(10)

SET @str = 'ABCDEFGHI'

SELECT substring(@str, 1, len(@str) - 3) + ' ' + right(@str, 3)



Cheers,

J-F
newbie_sql
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Many thanks
newbie_sql
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thanks
Im stuck at another thing now
I have to do this conversion for all rows in the table
if i write select @string=str_col from tbl1
follwed by all the other string conversion statements;it gives me only the first row

How do i write the select command in the stored procedure statement to run for all rows in the table?
J-F Bergeron
J-F Bergeron
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Well then, don't use the variable, it was only for the demo. Use your column name instead, and select it directly from your table.

Cheers,

J-F
Ivanna Noh
Ivanna Noh
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another method...


DECLARE @txt VARCHAR(20)

SELECT @txt = 'helloALL'

select STUFF(@txt,LEN(@txt)-2,0,' ')



:-)
Elliott Whitlow
Elliott Whitlow
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ps. (6/17/2009)
shiwani2002sg (6/17/2009)
i wish to extract last 3 characters of a string, in sql server 2005,.
substring doesnt accept -3 as length. so plz suggest some way

ex helloALL

output : ALL


Select RIGHT('helloALL',3) will give 'ALL'.

I think all the ones after this one are just academic, they show different ways to accomplish the same thing, but THIS is the easiest AND the one he should use. He wants the last three characters.. Bang.. Done.

CEWII
Ivanna Noh
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my code was in response to this question:


I want to split the string as below
<all chars-3> space <last 3 chars>
Eg: "ABCDEFG" should appear as "ABCD EFG"
"ABC DEFGH" should appear as "ABCDE FGH" etc


Cool
Jeff Moden
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SALIM ALI (6/18/2009)
you could try this, it's a bit crude but works...
declare @string varchar(50)
SET @string = 'ABCDEFGHIJ123'
select reverse ( substring ( reverse ( @string ) , 1 , 3 ) )


Heh... Old post I know but I just have to ask... why would you do two relatively expensive "reverses" when RIGHT will do the job just fine? (I mean before this thread got "silly". )

--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.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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Rick Quayle
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If you wish to remove the last 3 characters you can do this in the select statement without modifing the table contents (select reverse(stuff(reverse(field_name),1,3,'fig'))Field_Name

I do this to rename all the uploads from jpg,doc,eml,mpg, etc for all files so i can show a gif file as the thumbnail before they view the full picture or document.

Hope this helps someone other than myself.
Jeff Moden
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That will certainly work and if you don't have many rows, you probably won't notice, but REVERSE is comparatively very expensive... it would be computationally cheaper if you just used STUFF and LEN alone by a fair bit.

SELECT STUFF(yourcolumn,LEN(yourcolumn-3),3,'GIF') which would probably be the fastest.

--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.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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