Tom Kyte and Chuck Murray describe several improvements to default behavior in Oracle Database 12c: defaults based on sequences, default on NULL, Identity type columns, and metadata-only defaults. For more information:
Oracle Database 12c demos: In-Memory Column Store Architecture Overview
The demonstration provides an overview of the architecture of the In-Memory Column Store feature introduced in Oracle Database 12c Release 1 patchset 1.
Oracle Database 12c: Better PL/SQL From SQL
Overview and demonstration of using the plsql_declarations clause to embed a PL/SQL function in a SQL SELECT statement.
Oracle Database 12c: Introduction to a Multitenant Environment with Tom Kyte
Tom Kyte introduces Oracle Multitenant in Oracle Database 12c followed by a demo showing: multitenant architecture, moving a pluggable database (PDB) from one multitenant container database (CDB) to another, cloning a PDB, and creating a new PDB. For more information: