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What is the difference between UUID and ID?
A UUID is designed as a number that is globally unique in space and time. On the other hand a simply INT primary id key (e.g. AUTO_INCREMENT) will return a unique integer for the specific DB and DB table, but which is not universally unique (so if imported to another DB chances are there will be primary key conflicts).
Which UUID should I use?
If you need to always generate the same UUID from a given name, you want a version 3 or version 5. Version 3: This generates a unique ID from an MD5 hash of a namespace and name. If you need backwards compatibility (with another system that generates UUIDs from names), use this.
What is a UUID number?
Universally Unique Identifiers, or UUIDS, are 128 bit numbers, composed of 16 octets and represented as 32 base-16 characters, that can be used to identify information across a computer system. UUIDs are generally used for identifying information that needs to be unique within a system or network thereof.
Is there any difference between a GUID and an UUID?
A GUID and a UUID are essentially the same thing. The only difference is the CONTEXT of how they are used. GUIDs are normally associated with COM/ActiveX. UUIDs are more general. To make a GUID/UUID from a COMMAND LINE use the UUIDGEN command in the Visual Studio COMMON tools: UUIDGEN >mynewuuid.txt. Thanks for your answer.
Why to use UUID?
The point of a UUID is to have a universally unique identifier. There’s generally two reason to use UUIDs: You do not want a database (or some other authority) to centrally control the identity of records. There’s a chance that multiple components may independently generate a non-unique identifier.
Is UUID unique?
Alternatively referred to as a GUID (globally unique identifier), UUID is short for universal unique identifier and is a 128-bit unique identification value. UUIDs are used in the Apollo Network Computing System, OSF (Open Software Foundation), DCE (Distributed Computing Environment), and Microsoft Windows , and is fully defined in RFC 4122.