oracle19c介绍

oracle19c介绍
Title: Introduction to Oracle 19c
Introduction:
Oracle 19c is the latest version of the renowned Oracle Database Management System (DBMS), which offers improved performance, scalability, and security features. In this article, we will dive into the various aspects and enhancements of Oracle 19c, providing a
step-by-step overview.
Section 1: What is Oracle 19c?
- Oracle 19c is a robust and feature-rich DBMS that helps businesses manage and organize their data effectively.
- It is a product of Oracle Corporation and is considered one of the most popular choices among enterprise-level databases.
- Oracle 19c builds upon the foundations laid by its predecessors, offering enhanced capabilities and addressing the shortcomings of previous versions.
- It is designed with a focus on performance, scalability, high availability, and security.
Section 2: Key Features of Oracle 19c
2.1. Database In-Memory:
- Oracle 19c introduces Database In-Memory, an innovative feature that allows users to store data in both row and column formats simultaneously.
- This feature enhances analytical query performance, as it optimizes data access and minimizes disk I/O through columnar processing.
- It enables faster aggregation, filtering, and joins, making it an ideal option for multi-dimensional analysis.
2.2. Automatic Indexing:
- Oracle 19c brings Automatic Indexing, a self-tuning capability that automates the creation, maintenance, and removal of indexes.
- This feature uses machine learning algorithms to analyze the workload and identify potential index optimizations.
- It significantly reduces manual effort and enhances overall database performance.
2.3. Real Application Clusters (RAC):
- Oracle 19c extends the availability and scalability of the database by improving Real Application Clusters (RAC).
- It provides enhanced workload management with improved node-level fencing and faster instance recovery times.
- The new application continuity and fast start failover features ensure continuous availability and minimal downtime.
2.4. Multitenant Architecture:
- Oracle 19c introduces Multitenant Architecture, a new approach to database consolidation.
- It allows multiple pluggable databases (PDBs) to share a single container database (CDB), resulting in better resource utilization and simplified management.
- PDBs can be easily plugged or unplugged, enabling efficient scaling and resource allocation.
2.5. Active Data Guard DML Redirection:
- Oracle 19c enhances the Active Data Guard feature by introducing DML Redirection.
- DML Redirection allows users to redirect read-write operations to the standby database, improving performance and offloading primary workload.
- It enables high-performance reporting and supports scalability for mixed workloads.
Section 3: Security Enhancements
3.1. Data Masking:
- Oracle 19c offers advanced data masking capabilities to protect sensitive information during non-production operations.
- It enables users to create realistic and secure test environments by replacing sensitive data with realistic but anonymized data.
- Data masking reduces the risk of data breaches and helps organizations comply with privacy regulations.
3.2. Private Temporary Tables:
- Oracle 19c introduces private temporary tables, which are temporary tables that are created and used exclusively by a single session.
- These tables are session-specific and do not require explicit table creation or management.
- They offer improved security by ensuring data isolation and reducing the risk of data leakage across sessions.
Conclusion:
Oracle 19c is a powerful and versatile DBMS that provides numerous enhancements, performance improvements, and advanced security features. From Database In-Memory to Automatic Indexing, Real Application Clusters, and Multitenant Architecture, Oracle 19c offers a
wide range of capabilities to cater to the ever-evolving demands of businesses. By adopting Oracle 19c, organizations can streamline their data management processes, improve performance, and enhance data security, ultimately resulting in increased productivity and competitiveness.。