What are some good educational systems for preschool?

What are the Database Systems (historical, educational, in-production ) an engineer must be familiar with?

What are some good database systems(historical, educational, research, production) that should not be ignored? Please include the reason as well. There have been similar discussions on programming languages:
Answer:

The work of , including:

Was this solution helpful to you?

Other answers

System R is interesting from an historical perspective as it was the first RDBMS.

Neil Robbins

For getting a job in the commercial arena: Oracle, SQL Server, and Teradata Oracle has many sophisticated features and a large community of talented DBAs. It is expensive and worth the money. SQL Server is used by companies who are unwilling to pay Oracle's high price. It is a poor man's Oracle. Teradata is a feature-poor database favored for Big Data and Business Intelligence. It is a triumph of marketing and image over technology. CEOs choose it based on articles in airline magazines.

Robert Wagner

I think Relational Systems are important to know. There are good books that cover the development of this technology and the theory. Today, they are the most popular database technology. If I were teaching a course on database systems, I would also include Hierarchical and Network (CODASYL) databases as well. They were popular before Relational and I think it is good to know some of their history. Moving forward in time, some understanding of other database developments over the past 20 years or so would also be useful. For example, Object Databases, XML Databases, Column-Oriented Databases. More recently, we see the development of NoSQL databases.

Akmal Chaudhri

Oracle, SQL Server, MySql, DB2, PostGre SQL

Jack Menendez

Related Q & A:

What is the best data model and database systems to store social graph?Best solution by Quora
What is strategic Information Systems planning?Best solution by scm.ncsu.edu
What is the chance of being hired as a chemical engineer?Best solution by bls.gov
What is management information systems?Best solution by Yahoo! Answers
What are some songs with historical meaning?Best solution by redgage.com

Just Added Q & A:

How many active mobile subscribers are there in China?Best solution by Quora
How to find the right vacation?Best solution by bookit.com
How To Make Your Own Primer?Best solution by thekrazycouponlady.com
How do you get the domain & range?Best solution by ChaCha
How do you open pop up blockers?Best solution by Yahoo! Answers

For every problem there is a solution! Proved by Solucija.

Got an issue and looking for advice?
Ask Solucija to search every corner of the Web for help.
Get workable solutions and helpful tips in a moment.

Just ask Solucija about an issue you face and immediately get a list of ready solutions, answers and tips from other Internet users. We always provide the most suitable and complete answer to your question at the top, along with a few good alternatives below.