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 ...
, 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 particular attribute or combination of attributes is chosen as a primary key that can be referred to in other tables, when it’s called a foreign key. Each row, also called a tuple, includes data about a specific instance of the entity in question, such as a particular employee. The ...
An object is a named instance of a class that's created with specifically defined data. The object's attributes are unique from other objects based on the same class. The object serves as a simple representation of the class, abstracting the implementation details of the class itself. In this...
What is data modeling? Use data science tools and solutions to uncover patterns and build predictions by using data, algorithms, machine learning and AI techniques. Data and analytics consulting services Unlock the value of enterprise data with IBM Consulting, building an insight-driven organization ...
DBMS statistic types are supported for faster calculations on input data from remote databases. Aviation toolbox Enhanced tools Calculate ATS Route Attributes: Calculates more route attributes using FAA specific rules. The FAA True Track bearing attribute and FAA Magnetic Track bearing attribute can be...
Data modeling is the process of creating a diagram that represents your data system & defines the structure, attributes, and relationships of your entities.
If a table has a composite key made up of at least 3 attributes, 5NF occurs. Condition for join dependency If theR1andR2overQjoin is equal to theRdatabase table, then we can assume that there is a joint dependence whereR1andR2are theR1 (P, Q)andR2 (Q, S)decomposition of a given...
A logical schema, or conceptual schema, is the design of the database that describes the structure of different types of data as fields, entities, attributes, and relationships along with their data types. It’s mainly used to create relationships between tables or data. However, the structure...
The ER diagram example below shows an entity with some attributes in it. Primary Key Also known as PK, a primary key is a special kind of entity attribute thatuniquely defines a record in a database table. In other words, there must not be two (or more) records that share the same ...