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Re:Ask HN: GUID, int, or both for primary key? by jstewartmobile on Wednesday May 09, 2018 @01:40AM (#17027626)
If you do GUID PK or clustered index in an RDBMS, probably want to turn it into a monotonic GUID.

Many DBs order the table by PK. If the GUID value moves backward, that's a slow insert into the middle instead of a fast append to the end.

https://dba.stackexchange.com/a/17212

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