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What is ndm and hdm expressing relationship in dbms?
NDM (Network Data Model) and HDM (Hierarchical Data Model) are two types of database models used in DBMS. NDM organizes data in a graph structure, allowing for complex relationships and many-to-many connections, while HDM arranges data in a tree-like structure with a strict parent-child hierarchy. Both models represent data relationships but differ in their organization and access methods, with NDM offering more flexibility in relationships compared to the more rigid structure of HDM.
Which of the abstract data type can be used to represent to many to many relation?
A graph is an abstract data type that can effectively represent many-to-many relationships. In a graph, nodes (or vertices) represent entities, while edges represent the connections or relationships between them, allowing for multiple connections between different nodes. This structure is ideal for modeling complex relationships, such as social networks or collaborative systems, where numerous entities interact with one another in various ways.
What is a many to many relationship in dbms?
Many to many relationship in DBMS is usually a mirror of the real-life relationship between objects that tables represent.
How many bits are in a 232-bit data structure?
A 232-bit data structure contains 4,294,967,296 bits.
What the ERD?
Entity Relationship Diagrams (ERD's) are a way of diagrammatically showing entities in an organisations and how they relate to each other. ERD's show detailed representations of the information that is used in a system and how it relates to other data. There are a number of symbols that represent the entities and the relationships between them; the relationship can be a one to many relationship, many to many or one to one.
Which can be used to represent a many to many relation with abstract data types?
tree
What is the difference between relation and table in data base?
Table is where the data is stored and in a well designed schema a table represents some real world object such as CUSTOMER, ORDER, etc., Now the real world objects have relationships. For example, a CUSTOMER has many ORDERS. To represent this relationship a database relationship was invented.
What are pictorial figures that represent programs?
There are many such systems of diagrams used to aid program design (e.g. data flow diagrams, entity relationship diagrams, control flow diagrams, flowcharts).
How many wires is dedicated to transfer data?
A complete data bus structure is responsible to do this
What is the cardinality relationship?
Cardinality relationship refers to the quantitative relationship between two entities in a database or set theory, indicating how many instances of one entity can or must be associated with instances of another entity. In a relational database, cardinality can be classified into types such as one-to-one, one-to-many, and many-to-many. This concept helps in defining the structure and constraints of data relationships, ensuring data integrity and efficient querying. Understanding cardinality is crucial for designing effective database schemas.
What does the mean absolute deviation represent?
how many numbers your data is away from your mean
In order to represent a type of relationship a third table is created using the keys from the two entities being related?
That is done in a many to many relationship.
