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I was curious as to how SQL Server calculates uniqueidentifiers. I understand that uniqueidentifiers, are GUIDs but are these calculated based on system time? Or are they calculated based on the name of job/script that has called the NEWID() function. I found this but i found this reference to be unclear.
It depends on whether you are generating them from
NEWID()orNEWSEQUENTIALID()(the last one uses an algorithm involving the mac address the first one doesn’t)