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Derived column


Derived column

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komal145
komal145
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i have column value something like below.


{784A4579-8689-438E-ADAA-9DCBC8A88AE7}

I just need "784A4579-8689-438E-ADAA-9DCBC8A88AE7" i.e value between {}

can any one help me with this?

thanks!!
Lowell
Lowell
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nested replace would probably be the easiest:;
you could substring it as well, because the desired string, including dashes will be 36 chars.


SELECT REPLACE(REPLACE('{784A4579-8689-438E-ADAA-9DCBC8A88AE7}','{',''),'}',''),
SUBSTRING('{784A4579-8689-438E-ADAA-9DCBC8A88AE7}',2,36)



Lowell

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dan-572483
dan-572483
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If the length of the string might vary - but there will always be brackets - this will work:

declare @string varchar(max)
set @string = '{String you want to remove from the brackets}'
select SUBSTRING(@string, CHARINDEX('{',@string)+1,Charindex('}',@string)-2)


rVadim
rVadim
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If this is actually a GUID then you can also do this:



DECLARE @UST VARCHAR(38) = '{784A4579-8689-438E-ADAA-9DCBC8A88AE7}';
SELECT CAST(CAST(@UST AS UNIQUEIDENTIFIER) AS VARCHAR(36));



demonfox
demonfox
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Another way to do it using STUFF.


declare @testid varchar(50)=
'{784A4579-8689-438E-ADAA-9DCBC8A88AE7}'

select STUFF(stuff(@testid,len(@testid),len(@testid),''),1,1,'')



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gravitysucks
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dan-572483 (8/24/2012)
If the length of the string might vary - but there will always be brackets - this will work:

declare @string varchar(max)
set @string = '{String you want to remove from the brackets}'
select SUBSTRING(@string, CHARINDEX('{',@string)+1,Charindex('}',@string)-2)



Dan,
just out of curiousity-whats the logic behind using '-2' instead of '-1' with charindex.You need to use-2 even if you use len(@string). Whats the logic? I am guessing its because of +1 at the start position-but why? Thanks.
demonfox
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gravitysucks (8/25/2012)
dan-572483 (8/24/2012)
If the length of the string might vary - but there will always be brackets - this will work:

declare @string varchar(max)
set @string = '{String you want to remove from the brackets}'
select SUBSTRING(@string, CHARINDEX('{',@string)+1,Charindex('}',@string)-2)



Dan,
just out of curiousity-whats the logic behind using '-2' instead of '-1' with charindex.You need to use-2 even if you use len(@string). Whats the logic? I am guessing its because of +1 at the start position-but why? Thanks.


the actual syntax is :
SUBSTRING ( expression ,start , length )

here the length is how many characters of the expression is returned ; i.e the new string length expected.
as CharIndex on } gives the total length of the initial string, -2 is done to get total length of new string.

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dan-572483
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I realized that if erroneous text were in your column, my code might produce an incorrect result. Here is an improved version:

declare @string varchar(max)
declare @openbracket int
declare @closebracket int
set @string = 'extra{Text You Want}text'
set @openbracket = charindex('{',@string)
set @closebracket = charindex('}',@string)
IF @openbracket >0 and @closebracket >0
BEGIN
select SUBSTRING(@string, @openbracket +1, @closebracket-@openbracket-1) as 'Result'
End
Else
Select 'Invalid Data' as 'Result'


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