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ServiceNow gs.generateGUID() or other unique ID generator types

 link:

https://developer.servicenow.com/dev.do#!/reference/api/tokyo/server/no-namespace/c_GlideSystemScopedAPI#r_ScopedGlideSystemGenerateGUID

"Generates a GUID that can be used when a unique identifier is required."


personalId = gs.generateGUID();
gs.info(personalId);


Output:

*** Script: b3b17d8f97f02110df843a300153af6c


alternative

if you just wanted a number, could use something like:
Math.floor(Math.random() * 1000000) 


You could set a property to be the counter and increment from there. There would technically be a race condition where two threads could read the same value and come up with the same result but it would be very difficult to produce that issue.

or use a GlideRecord lookup for existing non-employee profiles to get the max value and increment that

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