Open Source and Commercial DBMS

  OPEN-SOURCE DBMS

An open-source database has code that is open and free for download, modification, and re-use. This is the opposite of a closed source database in which the code is protected to prevent copying.

Open-source databases store vital information in software which the organization can control. An open-source database allows users to create a system based on their unique requirements and business needs. It is free and can also be shared.

The data contains vast amounts of information that can overload a traditional database. The flexibility and cost-effectiveness of open source database software have revolutionized database management systems.

The most common open-source databases include:

• Key-value databases — store key and value data in memory for speedy lookup.
• Document databases — store document information.

COMMERCIAL DBMS

Commercial databases are simply collections of information presented electronically. Database range in size from simple books made searchable, to several billion records in the larger news database. 

Products with the same name may contain different information. Databases are frequently combined into a larger collection of databases, often several times. An individual magazine or database may exist within several databases and several collections. 

You will access commercial databases through these five basic sources.

1.  From a commercial database retailer.
2.  From alternatively funded internet sources.
3.  Through a library or other venue with a site license.
4.  With the help of information professionals.
5.  Directly from the source with a personal subscription.