Convert varchar to uniqueidentifier in SQL Server
DECLARE @uuid VARCHAR(50)
SET @uuid = 'a89b1acd95016ae6b9c8aabb07da2010'
SELECT CAST(
SUBSTRING(@uuid, 1, 8) + '-' + SUBSTRING(@uuid, 9, 4) + '-' + SUBSTRING(@uuid, 13, 4) + '-' +
SUBSTRING(@uuid, 17, 4) + '-' + SUBSTRING(@uuid, 21, 12)
AS UNIQUEIDENTIFIER)
SELECT CONVERT(uniqueidentifier,STUFF(STUFF(STUFF(STUFF('B33D42A3AC5A4D4C81DD72F3D5C49025',9,0,'-'),14,0,'-'),19,0,'-'),24,0,'-'))
your varchar col C:
SELECT CONVERT(uniqueidentifier,LEFT(C, 8)
+ '-' +RIGHT(LEFT(C, 12), 4)
+ '-' +RIGHT(LEFT(C, 16), 4)
+ '-' +RIGHT(LEFT(C, 20), 4)
+ '-' +RIGHT(C, 12))
It would make for a handy function. Also, note I'm using STUFF instead of SUBSTRING.
create function str2uniq(@s varchar(50)) returns uniqueidentifier as begin
-- just in case it came in with 0x prefix or dashes...
set @s = replace(replace(@s,'0x',''),'-','')
-- inject dashes in the right places
set @s = stuff(stuff(stuff(stuff(@s,21,0,'-'),17,0,'-'),13,0,'-'),9,0,'-')
return cast(@s as uniqueidentifier)
end
or a one-liner:
cast(stuff(stuff(stuff(stuff(replace(replace(@s,'0x',''),'-',''),21,0,'-'),17,0,'-'),13,0,'-'),9,0,'-') as uniqueidentifier)