Generalization, as the name suggests, is a process of generalizing two or more lower-level entity types into a higher-level entity type. Entities are clubbed or grouped together to represent a more generalized view. In this process, the common attributes of two or more entities combine to ...
Aggregated data is useful when the focus is on high-level trends or summary information, rather than granular details. What tools and platforms support aggregate functions? Most database management systems (DBMS) and data processing platforms, such as SQL, NoSQL, and Hadoop, support aggregate func...
, also called vertical scaling, is the process of adding resources, such as memory or more powerful CPUs, to an existing server. Scaling out (or in), also called horizontal scaling, adds more machines to your pool of resources. Scaling horizontally instead of scaling vertically extends the lif...
A cardinality notation can then define the attributes of the relationship between the entities. Cardinalities can denote that an entity is optional (for example, a sales rep could have no customers or many) or mandatory (at least one product must be listed in an order). These are the three ...
What is a cloud database? An in-depth cloud DBMS guide Which also includes: Should you run your database on premises or in the cloud? Cloud DBA: How cloud changes database administrator's role On-premises vs. cloud data warehouses: Pros and cons Graph databases are well suited for analy...
An object belonging to a particular class, such as in Java, may also be described as an instance. Instances of a class share the same set of attributes, but each instance may differ in terms of what is contained in those attributes. Techopedia Explains Instance For example, a school class...
An ERD is a conceptual and representational model of data used to represent the entity framework infrastructure. Advertisements The elements of an ERD are: Entities Relationships Attributes Steps involved in creating an ERD include: Identifying and defining the entities Determining all interactions ...
Data modeling is the process of creating a diagram that represents your data system & defines the structure, attributes, and relationships of your entities.
Objects are basically bundles of information and associated code. Each object represents an entity. Objects are grouped in classes and have attributes that describe their characteristics and methods that define their behavior. For example, an object in the “cat” class might have the attributes “...
Each column lists an attribute of the entity in question, such as price, zip code, or birth date. Together, the attributes in a relation are called a domain. A particular attribute or combination of attributes is chosen as a primary key that can be referred to in other tables, when it...