Her manager's email still burned in her inbox: "Migrate all 12,000 Oracle 11g procedures to 19c by Friday. No budget for consultants. Good luck."
Gone are the days when stale statistics caused poor execution plans. allows the database to gather statistics during DML operations (inserts, updates, deletes) in real-time. This provides the optimizer with up-to-the-minute information on data distribution, leading to more accurate execution plans without the overhead of manual, batch-style statistics collection. 1.3 High-Frequency Statistics Gathering
The Oracle SQL 19c PDF guide covers the following topics:
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While primarily an architectural feature, SQL statements can now take advantage of automatic index creation, modification, and deletion based on workload patterns.
19c allows you to use dot-notation syntax on JSON columns more reliably within your SELECT , WHERE , and ORDER BY clauses. 2. Standardized SQL Macro Support
: Better integration with user-defined object types and collections. 3. Real-Time SQL Monitoring Her manager's email still burned in her inbox:
Data lakes often leverage low-cost cloud storage. Oracle 19c lets you write standard SQL queries directly against external files hosted on Amazon S3, Microsoft Azure Blob Storage, or Oracle Cloud Infrastructure (OCI) Object Storage using the DBMS_CLOUD package. Supports formats like Parquet, Avro, ORC, CSV, and JSON.
Test production SQL workloads against the new 19c environment to identify syntax changes or hidden bottlenecks before the final cutover.
Allows you to update specific portions of a JSON document without rewriting the entire record. allows the database to gather statistics during DML
Prevents rogue queries from repeatedly impacting overall system stability. 3. Enhanced JSON Support
A: The "What's New" section in each guide highlights the changes for that specific area. For an overall view, the "Oracle Database 19c New Features Guide" provides a comprehensive summary. You should also refer to the "Deprecated and Desupported Features" section in the Upgrade Guide to understand any breaking changes.
Modern data management often involves JSON and PL/SQL packages. Oracle 19c has strong support for both.