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A GUID (UUID) is a Universally Unique identifier that is used to identify information in computer systems in a way to avoid duplicates, in most real-life situations. Is is represented by a 128-bit number
A GUID (UUID) makes replication trivial - as opposed to integers, which makes it really difficult if combining multiple database sources
It is unique across applications, in general. There is a chance of duplicates, but the chance depends on the number of records.
If you need more data, for more complex scenarios, with nullable options, or weights, you can use our online tool. The random online GUID generator is just a small part of Online Data Generator. Access more than 70 data types on our website with configurable options.