Oracle SQL 19c provides several ways to query and filter data, including:

Oracle SQL 19c is a database management system that allows users to store, manage, and retrieve large amounts of data efficiently. It is designed to support various applications, from small websites to large-scale enterprise systems. Oracle SQL 19c is built on the foundation of Oracle Database 19c, which provides a robust and scalable architecture for data storage and retrieval.

In 19c, managing "Pluggable Databases" (PDBs) is done through SQL. Learning how to switch containers ( ALTER SESSION SET CONTAINER = pdb_name; ) is a prerequisite for modern DBAs. Where to Find Official Oracle SQL 19c PDFs

SQL execution plans are now more accurate thanks to statistics gathered during DML operations. Core SQL Concepts in 19c

Oracle provides official documentation in PDF format. For Oracle Database 19c: