You update the table when you add new information. There are various ways to do this, but it all depends on the system you’re using. I am not incredibly familiar with Oracle. However, I am familiar with making a table in Word, and it’s pretty easy to update those tables. The skill isn’t incredibly transferrable when it comes to doing cross-program training.
That said, there are plenty of training videos out there for those who want to learn how to do this on Oracle or in other programs that use tables to keep track of information. Most of these videos are up on YouTube and done by people who mean well, but the companies typically have FAQ or tutorial pages that will offer in-depth help if asked.