Introduction

Oracle is an efficient relational database system which is developed and marketed by Oracle Corporation.
Oracle is available in 5 different editions to support different development and deployment scenarios

  1. Enterprise Edition(EE)

    • For medium to very large implementations.
    • no limitation on server resources available to database.
    • offers very good scalability and reliability in both clustered and single system configurations

  2. Standard Edition(SE)

    • for small to medium sized implementations
    • Includes Real application Clusters with a limitation of 2 sockets and 16 concurrent user threads.
    • Upwardly compatible to EE

  3. Personal Edition (PE)

    • for single user, single machine development and deployment
    • Upwardly compatible to EE and SE2

  4. Express Edition (XE)

    • Free entry level version for both windows and linux
    • Limitations up to 2 CPUs, up to 2GB RAM and 12GB of user data.

  5. Oracle Lite

    • Designed for mobile devices.