Released in early 2019, Oracle Database 19c is the long-term release for the 12c, 18c and 19c family of databases. This means that Oracle Database 19c has all the innovations in 12c, 18c and 19c, with premier support through to April 2024 and extended support through to April 2027. In addition, Oracle Database 19c now supports up to 3 pluggable databases (PDBs) per container database (CDB) without requiring additional multitenant license. See page 11 of Oracle Database Licensing Information User Manual for more details. 
Oracle Database 19c | Up to 3 PDBs per CDB Without Licensing Multitenant
Authors
William Hardie
Vice President, Product Management
William Hardie is Vice President of Oracle Database Product Management. He has been in IT for more than 30 years, and has specialized in relational database technologies for more than 25 years.
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