Databases

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Introduction to Databases - Stanford University. Thomas Neumann: D5: Databases and Information Systems (Max-Planck-Institut für Informatik) [an error occurred while processing this directive] © 2008 Thomas Neumann Note:

Thomas Neumann: D5: Databases and Information Systems (Max-Planck-Institut für Informatik)

Orient - NoSQL document database light, portable and fast. Supports ACID Tx, Indexes, asynch queries, SQL layer, clustering, etc. Orient Technologies - Open source solutions built around the Orient DB. Neo4j open source nosql graph database.

ODBMS.ORG :: Object Database (ODBMS) | Object-Oriented Database (OODBMS) | Free Resource Portal. Entity-relationship model. An entity–relationship diagram using Chen's notation In software engineering, an entity–relationship model (ER model) is a data model for describing the data or information aspects of a business domain or its process requirements, in an abstract way that lends itself to ultimately being implemented in a database such as a relational database.

Entity-relationship model

The main components of ER models are entities (things) and the relationships that can exist among them. The Apache Cassandra Project. YAGO-NAGA - D5: Databases and Information Systems (Max-Planck-Institut für Informatik) Overview YAGO2s is a huge semantic knowledge base, derived from Wikipedia WordNet and GeoNames.

YAGO-NAGA - D5: Databases and Information Systems (Max-Planck-Institut für Informatik)

Currently, YAGO2s has knowledge of more than 10 million entities (like persons, organizations, cities, etc.) and contains more than 120 million facts about these entities. Unified Modeling Language. UML logo The Unified Modeling Language (UML) is a general-purpose modeling language in the field of software engineering.

Unified Modeling Language

The basic level provides a set of graphic notation techniques to create visual models of object-oriented software-intensive systems. MongoDB. Graph-database.org. NoSQL is What? | Jeremy Zawodny's blog. I found myself reading NoSQL is a Premature Optimization a few minutes ago and threw up in my mouth a little.

NoSQL is What? | Jeremy Zawodny's blog

That article is so far off base that I’m not even sure where to start, so I guess I’ll go in order. In fact, I would argue that starting with NoSQL because you think you might someday have enough traffic and scale to warrant it is a premature optimization, and as such, should be avoided by smaller and even medium sized organizations. You will have plenty of time to switch to NoSQL as and if it becomes helpful.

Until that time, NoSQL is an expensive distraction you don’t need. Database Models: Hierarcical, Network, Relational, Object-Oriented, Semistructured, Associative and Context. The context data model combines features of all the above models.

Database Models: Hierarcical, Network, Relational, Object-Oriented, Semistructured, Associative and Context.

It can be considered as a collection of object-oriented, network and semistructured models or as some kind of object database. In other words this is a flexible model, you can use any type of database structure depending on task. Such data model has been implemented in DBMS ConteXt. The fundamental unit of information storage of ConteXt is a CLASS. Class contains METHODS and describes OBJECT. Home - GitHub. Associative model of data. The associative model of data is an alternative data model for database systems.

Associative model of data

Other data models, such as the relational model and the object data model, are record-based. These models involve encompassing attributes about a thing, such as a car, in a record structure. Such attributes might be registration, colour, make, model, etc. Getting the most *out* of your data. PyTables is a package for managing hierarchical datasets and designed to efficiently and easily cope with extremely large amounts of data.

Getting the most *out* of your data

You can download PyTables and use it for free. You can access documentation, some examples of use and presentations in the HowToUse section. PyTables is built on top of the HDF5 library, using the Python language and the NumPy package. It features an object-oriented interface that, combined with C extensions for the performance-critical parts of the code (generated using Cython), makes it a fast, yet extremely easy to use tool for interactively browse, process and search very large amounts of data.