This video introduces the viewer to the concept of conceptual data modeling and describes some of the details of the Entity-Relationship diagram (ERD).
This video discusses some of the data modeling issues encountered while transitioning from a relational database to NoSQL. Large data sets are driving adoption of NoSQL technologies and transitioning from relational persistence to NoSQL persistence is non-trivial.
In an Unified Modeling Language (UML) use case diagram, an include dependency is a generalization relationship that describes the inclusion of the behavior described by another use case. A UML use case can include more than one use cases and it can be included in multiple use cases.
Ever seen technical drawings you just couldn’t make any sense of, even though you know very well what they were supposed to show? Sometimes a picture is worth a thousand words, but sometimes a thousand words can’t repair the damage done by a bad drawing.
This short tutorial explain how to draw a UML use case diagram for an ATM system. A use case diagram can portray the different types of users of a system and the various ways that they interact with the system.
This talk covers the key ideas of NOSQL databases, including motivating similarities and more importantly their different strengths and weaknesses. In more depth, we’ll focus on the characteristics of graph stores for connected data and the kinds of problems for which they are best suited.