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The LISTAGG aggregate function, commonly used in reporting to string together values from column rows, now natively supports the DISTINCT keyword. This eliminates the need for complex inner query structures when filtering out duplicate items.
The absolute authority on all SQL commands, built-in functions, data types, and syntax diagrams. oracle sql 19c pdf new
You can now use the JSON_OBJECT and JSON_ARRAY functions to generate complex JSON structures directly out of standard SQL queries.
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Oracle 19c introduced several SQL and PL/SQL capabilities designed to simplify development, enhance analytical capabilities, and improve runtime performance. 1. JSON Enhancements in SQL
As Oracle releases new certification exams based on 19c, study guides are constantly updated. Look for – these guides are designed to highlight only the changes, making them excellent "new features" summaries. The absolute authority on all SQL commands, built-in
You can download the official Oracle SQL 19c PDF guide from the Oracle website. Here is the link:
In 19c, you can perform DML operations on Active Data Guard standby databases. These operations are automatically redirected to the primary database, enabling more efficient utilization of standby resources for reporting applications.