#rodsays #plsql
Add this:

WHENEVER SQLERROR EXIT

This means that if your table check generates an ORA-20001 error (or any other sql errors), nothing else will get run. Just in case someone runs the entire script. Without this, it would keep running everything after the error.

#rodsays Always use "TIMESTAMP(6) WITH TIME ZONE". TIMESTAMP does not store time zone information -- it should only be used when the column value is directly tied to a single time zone (e.g. LASTUPDATETIMEINGMT).

#plsql