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Database. An SQL select statement and its result. In computing, a database is an organized collection of data or a type of data store based on the use of a database management system (DBMS), the software that interacts with end users, applications, and the database itself to capture and analyze the data. The DBMS additionally encompasses the ...
A relational database (RDB[1]) is a database based on the relational model of data, as proposed by E. F. Codd in 1970. [2] A database management system used to maintain relational databases is a relational database management system (RDBMS). Many relational database systems are equipped with the option of using SQL (Structured Query Language ...
Entity–relationship model. An entity–attribute-relationship diagram for an MMORPG using Chen's notation. An entity–relationship model (or ER model) describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types (which classify the things of interest) and specifies relationships ...
Third normal form (3NF) is a database schema design approach for relational databases which uses normalizing principles to reduce the duplication of data, avoid data anomalies, ensure referential integrity, and simplify data management. It was defined in 1971 by Edgar F. Codd, an English computer scientist who invented the relational model for ...
Progymnasmata (Greek προγυμνάσματα "fore-exercises"; Latin praeexercitamina) are a series of preliminary rhetorical exercises that began in ancient Greece and continued during the Roman Empire. These exercises were implemented by students of rhetoric, who began their schooling between ages twelve and fifteen. The purpose of these ...
There are a jaw-dropping 5.35 billion internet users around the world. But you’d be surprised how many people are not aware of the free resources available to them. The post 52 Incredibly Cool ...
Database model. A database model is a type of data model that determines the logical structure of a database. It fundamentally determines in which manner data can be stored, organized and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.
Pre-assessment is a test taken by students before a new unit to find out what the students need more instruction on and what they may already know. A pre-assessment, is a way to save teachers time within the classroom when teaching new material. It is a great way to find out more about the students, what they are interested in and how they ...