As a well-known relational database management system, Oracle continues to launch new versions to meet user needs and provide more functions. This article will provide an in-depth introduction to the characteristics of different versions of Oracle to help readers choose the version that suits their needs.
Oracle 11g is the previous major version of the Oracle database, which introduces many new features and improvements. Among the most notable features are Grid Computing and Automatic Storage Management (ASM). Grid Computing improves performance and scalability by uniting multiple computers as a whole to handle data management tasks. ASM is a disk group-based storage management technology that can simplify database management and improve storage efficiency.
The following is a simple example that demonstrates how to create an ASM disk group:
CREATE DISKGROUP data_group NORMAL REDUNDANCY FAILGROUP controller_a DISK '/devices/diska1' NAME diska FAILGROUP controller_b DISK '/devices/diskb1' NAME diskb;
Oracle 12c is a major update to the Oracle database, introducing many new Features, the most obvious are Multitenant architecture and In-Memory column storage. Multitenant architecture allows multiple tenants to share an instance, with each tenant having its own independent database. In-Memory column storage improves query performance by storing hot data in memory.
The following is an example that demonstrates how to use In-Memory column storage in Oracle 12c:
ALTER TABLE employees INMEMORY;
Oracle 19c is the latest version of Oracle database, which is Based on Oracle 12c, the performance and functions have been further improved and optimized. It is worth mentioning that Oracle 19c introduces the automatic index creation function, which can help users automatically create and optimize indexes to improve query performance.
Here is an example that demonstrates how to use the automatic index creation feature in Oracle 19c:
CREATE TABLE employees ( id NUMBER, name VARCHAR2(50), age NUMBER ); CREATE INDEX idx_name ON employees(name) INVISIBLE;
With a brief introduction to Oracle 11g, 12c and 19c, we You can see that each version has its own features and advantages. If you are interested in Grid Computing and ASM, you can choose Oracle 11g; if you need to support Multitenant architecture and In-Memory column storage, you can choose Oracle 12c; if you want to make full use of the automatic index creation function, you can choose Oracle 19c.
Which version you ultimately choose depends on your specific needs and project circumstances. I hope the introduction in this article can help you make a wise choice.
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