How get only ID from long string in SQL Server - sql

Question

in the below string, I need your help in order to know how I can get or select only GUID (NVARCHAR(36)) using a T-SQL query?
N'yes#red#A5257199-8B09-44F1-8073-C5D5F02126F9#No#fuchsia#A5A5B2F2-1B87-4B0E-85B6-16A287814574#'

Answer 1

If you REALLY don't want to use the function as suggested by Prdp (which is honestly the right way to go), you can do something like below
Declare #YourTable table (ID int,SomeString varchar(max))
Insert into #YourTable values
(1,'yes#red#A5257199-8B09-44F1-8073-C5D5F02126F9#No#fuchsia#A5A5B2F2-1B87-4B0E-85B6-16A287814574#')
Select A.ID
,GUIDs = B.RetVal
From #YourTable A
Cross Apply (
Select RetSeq = Row_Number() over (Order By (Select null))
,RetVal = LTrim(RTrim(B.i.value('(./text())[1]', 'varchar(max)')))
From (Select x = Cast('<x>'+ Replace(A.SomeString,'#','</x><x>')+'</x>' as xml).query('.')) as A
Cross Apply x.nodes('x') AS B(i)
) B Where Len(RetVal)=36
Returns
ID GUIDs
1 A5257199-8B09-44F1-8073-C5D5F02126F9
1 A5A5B2F2-1B87-4B0E-85B6-16A287814574

Answer 2

Create a split string function to split the the data into different rows then check if the row is unquieidentfier then use it.
The function is refered from this article Tally OH! An Improved SQL 8K “CSV Splitter” Function
CREATE FUNCTION [dbo].[DelimitedSplit8K]
(#pString VARCHAR(8000), #pDelimiter CHAR(1))
RETURNS TABLE WITH SCHEMABINDING AS
RETURN
--===== "Inline" CTE Driven "Tally Table" produces values from 0 up to 10,000...
-- enough to cover NVARCHAR(4000)
WITH E1(N) AS (
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
), --10E+1 or 10 rows
E2(N) AS (SELECT 1 FROM E1 a, E1 b), --10E+2 or 100 rows
E4(N) AS (SELECT 1 FROM E2 a, E2 b), --10E+4 or 10,000 rows max
cteTally(N) AS (--==== This provides the "base" CTE and limits the number of rows right up front
-- for both a performance gain and prevention of accidental "overruns"
SELECT TOP (ISNULL(DATALENGTH(#pString),0)) ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM E4
),
cteStart(N1) AS (--==== This returns N+1 (starting position of each "element" just once for each delimiter)
SELECT 1 UNION ALL
SELECT t.N+1 FROM cteTally t WHERE SUBSTRING(#pString,t.N,1) = #pDelimiter
),
cteLen(N1,L1) AS(--==== Return start and length (for use in substring)
SELECT s.N1,
ISNULL(NULLIF(CHARINDEX(#pDelimiter,#pString,s.N1),0)-s.N1,8000)
FROM cteStart s
)
--===== Do the actual split. The ISNULL/NULLIF combo handles the length for the final element when no delimiter is found.
SELECT ItemNumber = ROW_NUMBER() OVER(ORDER BY l.N1),
Item = SUBSTRING(#pString, l.N1, l.L1)
FROM cteLen l
;
GO
To extract the GUID
DECLARE #str NVARCHAR(4000)= N'yes#red#A5257199-8B09-44F1-8073-C5D5F02126F9#No#fuchsia#A5A5B2F2-1B87-4B0E-85B6-16A287814574#'
SELECT item
FROM dbo.[Delimitedsplit8k](#str, '#')
WHERE Try_cast(item AS UNIQUEIDENTIFIER) IS NOT NULL
In case you are using SQL SERVER 2016 then you can use STRING_SPLIT function instead of dbo.[Delimitedsplit8k]