Standard language for accessing databases. Queries, clauses, dynamic executions, traces, execution plans, inserts, updates, inserts, deletes, merges, joins, unions, intersections, complex cases, direct data loads, temporary data sets, queues, embedded queries in programming languages ( C, Python, etc.), most common SQL interfaces (SQL Developer, Toad, DBeaver, etc.).

Oracle RDBMS architecture, Oracle engine, instances, schemas, roles, privileges, users, resources, quotas, tablespaces, segments, redo logs, archive log, tables, partitions, indexes, constraints, views, materialized views, job queues, virtual data base , distributed data base, data guard, rman, compression & encryption, data types, triggers, special administration packages, PL/Sql, data pump, import/export, Sqlldr, external tables, dynamic Sql, V$ views, Enterprise manager, Sql Developer, directories, Sql tuning, execution plan, tkprof, LOB management, XML & Json drivers, dynamic Sql, Data base modeling, Star schema, Snowflake schema, integrity checks, Data quality, Data versioning.