uuid function
Applies to: 
Databricks SQL Databricks Runtime
Returns a universally unique identifier UUID string.
A UUID is a 128-bit value used to uniquely identify objects or entities on the Internet. The term "globally unique identifier" (GUID) is also used. While UUIDs are not guaranteed to be unique, the probability of two UUIDs being the same is so low that they can be considered unique for practical purposes.
Syntax
uuid()
Arguments
The function takes no argument.
Returns
A STRING formatted as a canonical UUID 36-character string.
The function is non-deterministic.
Examples
SQL
> SELECT uuid();
46707d92-02f4-4817-8116-a4c3b23e6266