Oracle SQL 19c supports a wide range of data types and operators, including:
Perhaps the most heralded feature of 19c, , uses machine learning algorithms to constantly monitor queries, identify missing indexes, create them as "invisible" test indexes, validate their performance impact, and implement them globally if they provide a measurable benefit. This virtually eliminates manual index tuning. SQL Plan Management (SPM) and Baselines oracle sql 19c pdf
MERGE INTO target_table t USING source_table s ON (t.employee_id = s.employee_id) WHEN MATCHED THEN UPDATE SET t.salary = s.new_salary WHEN NOT MATCHED THEN INSERT (employee_id, salary) VALUES (s.employee_id, s.new_salary); Use code with caution. Data Definition Language (DDL) Oracle SQL 19c supports a wide range of
: SQL Tuning Guide