Greetings from the Oracle realm, my fellow explorers! Oracle 12c and Oracle 19c are two mighty titans, and today we set out on a thrilling journey to investigate their intriguing differences.

These versions, each with unique charms, represent crucial turning points in the development of the Oracle Database. So, let’s get started.

What is Oracle Database 12c?

Oracle Database 12c is specifically created to meet the needs of the database infrastructure of the 21st century. Oracle Database 12c provides efficiency while enhancing user service levels by combining the capacity to consolidate and deliver the agility of a service-oriented platform via in-database virtualization.

With support for various server and storage hardware platforms, Oracle Database 12c is a heterogeneous relational database management system that operates on Windows, Linux, and Unix.

What are the features of 12c Oracle?

The 12c Oracle’s relevant features for the developers are provided as under:

1. Enhanced Database Security: Privilege analysis, transparent data encryption, and auditing upgrades are a few of the fresh safety features introduced in Oracle 12c, which improve the database’s security and compliance capabilities.
2. Oracle Database In-Memory: With the new Oracle Database In-Memory option introduced and data can be stored in memory in columnar format, enabling quicker analytical queries and real-time analytics.
3. Multitenant Architecture: The introduction of multitenant architecture is the most critical change.
4. Increased Column Size Limits: Larger column sizes are supported and enable more data storage in a single column.
5. Pluggable Databases: This feature makes resource management and administration easier by allowing numerous databases to be combined and administered as a single container database.
6. Invisible Columns: Columns can be marked as hidden, meaning they are not displayed by default in queries, providing flexibility in managing table structures.
7. Default Values: With the ability to specify default values for columns introduced, a value is permanently assigned when a new row is inserted.
8. Invisible Indexes: Indexes can be designated as invisible, which prevents the optimizer from using them by default. This makes performance testing and optimization easier.
9. Session Sequences: With the ability for each session to have its sequence values, it is possible to generate unique values without synchronization across sessions.
10. DDL Logging: DDL (Data Definition Language) logging is a new feature that enables tracking and auditing modifications to database structures like tables and indexes.

What is Oracle 12c used for?

Making users’ transitions to the cloud simpler is a critical component of Oracle Database 12c’s design. Without needing any application modifications, the multitenant architecture is intended to simplify consolidation. Consolidation is a crucial step in becoming cloud-ready. Rapid provisioning and transfer capabilities are made possible by the pluggable databases.

As a result, self-service provisioning and database as a service are both excellent uses for Oracle Database 12c.

What is Oracle Database 19c?

The latest long-term release, Oracle Database 19c, offers the highest level of release stability and the most time for support and issue fixes. It is the last release of the Oracle Database 12c family of products, including Database 18c, and is therefore considered to be in “long-term support.”

“Long-term support” includes at least 3 years of extended assistance and 4 years of premium support. It will be supported through 2023, with Extended Support going until 2026, equivalent to 12.2.0.3.

What are the features of 19c Oracle?

Clients have access to a multi-model enterprise-class database suitable for a wide variety of everyday operations with the additional features introduced in this edition, including the following:

1. Hybrid Separated Tables: This feature allows database administrators to split a table into multiple parts, each of which can be stored in a separate, low-cost, read-only datastore. These data stores may exist locally or in a cloud service.
2. Automated Indexing: This feature constantly creates and modifies indexes using machine learning (ML) techniques to increase performance and save costs. The database will look at how the data is queried and generate indexes over a short period to give efficient access plans for that dataset so that you can start the database with no indexes or significantly fewer.
3. Diagnosability: Through detailed diagnostic reports and logs, Oracle 19c’s improved diagnostic capabilities enable users to discover and fix performance and system problems quickly.
4. Performance: It features several performance upgrades, like automatic indexing, real-time statistics, and memory management improvements, which speed up query execution and improve system performance in general.
5. Availability: Through capabilities like Oracle Data Guard, Oracle Active Data Guard, and Automatic Failover, it provides continuous access to vital data while ensuring high availability and minimizing downtime.
6. Security: To preserve sensitive data, prevent unwanted access, and guarantee adherence to security standards and regulations, it combines cutting-edge security features such as Oracle Advanced Security Option, Transparent Data Encryption, and Unified Auditing.

What is the difference between Oracle 12c and 19c?

Since Oracle 19c replaces Oracle 12c, there must be significant distinctions between the two. Here are some important differences between these two databases:

Conclusion

Compared to Oracle 12c, which boasts ground-breaking capabilities like pluggable databases and multitenant architecture, Oracle 19c has better performance, more security, and seamless cloud integration. Both are impressive, but 19c’s tricks leave you spellbound. So, if you seek a database that combines innovation with enchantment, 19c is your captivating choice.

FAQ’s

1. Can we install Oracle 19c and 12c same machine?

Yes, both may be installed on the same machine.

2. Is Oracle 19c backward compatible with 12c?

Yes, both are back-compatible.

3. Can I upgrade Oracle 12c to 19c?

It is possible to upgrade from 12c to 19c.

4. What is the maximum size of Oracle 19c?

The maximum size varies by edition, with the Enterprise Edition’s maximum size set at 128 terabytes.

5. What does C stand for in Oracle 19c?

The C stands for “Cloud”.