This post serves as a reference to close and open PDB databases. I have been mentoring some colleagues on the way to a data and database management career. As we have been managing Oracle multitenant environments quite often, I decided to create an example where they can easily visualize and have a reference on it. I made another blog post where one can imagine the existence of PDBs (https://www.techdatabasket.com/2018/11/08/how-to-check-if-my-database-is-a-cdb-database-or-not/). Thus, follow below is the representation of the closing and opening of a database instance named TECHDB in an Oracle RAC…