About

Oracle is a Multi-Model Database Management System created by Oracle Corporation.

Note: This tag is not for questions about other products owned by Oracle Corporation, such as Java and MySQL.

It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java.

Free version of Oracle database

Oracle provides a free version of their on-premises database called Oracle Database Express Edition (Oracle XE), and a free version of their cloud service database called Always Free Autonomous Database.

When posting questions with the oracle tag, please be sure to always include Oracle edition and version.

How to tag questions

• about SQL in general should probably be tagged sql.
• about PL/SQL in particular should probably be tagged plsql as well as oracle.
• specific to a particular database version may be tagged oracle21c,oracle19c,oracle18c,oracle12c,oracle11g, oracle10g or oracle9i, as appropriate, but they should also be tagged oracle at least.
• about the free version of Oracle, Oracle XE, may be tagged oracle10g or oracle11g, but should be tagged oracle at least.
• about Oracle HTMLDB or Application Express (any version) may be tagged oracle-apex, but should be tagged oracle at least.
• about Oracle Objects for OLE should be tagged oracle-objects-ole to avoid confusion with standard provider methods of accessing Oracle data.
• about other Oracle Corp. database products should not be tagged oracle, rather use the more specific tag to the technology, e.g. mysql.
• about Oracle Exadata Appliance (any version) may be tagged exadata, but should be tagged oracle at least.

Useful links

• Oracle Documentation
• SQL Language Reference
• Application Express
• PL/SQL Language Reference
• PL/SQL Packages and Types Reference
• Oracle JSON Developer's Guide
• Oracle Text Application Developer's Guide
• Oracle Ask Tom

Book recommendations

• Expert Oracle Database Architecture by Thomas Kyte

• Oracle PL/SQL Programming by Steven Feuerstein