0
How are relationship between tables expressed in a relational database?
Nayyab jarral
Tables are the basic building blocks of a relational database.
Kayleigh Padberg
Add your answer:
Earn +20 pts
What is the most common type of relationship between tables in a relational database?
one-to-many relationship
Distinguish between a relation and a relationship in database?
Relation is one record in the database or a tuple. Relationship is that how tables are connected to each other.
What is a relational diagram give an example?
Something that will have a link/relationship to something else. For example: The relationship between the speed of a car, and the angle of a hill is: The steeper the hill, the faster the car will go.
What is relationship in er diagram?
In Database Analysis and Design; the relationship in an ERD can only be mandatory or optional between two entities. Mandatory is where both entities must be present, whereas with optional, you don't always need two entities.
How do you find relation between tables in a database?
There are two generic types of relationships that are found between tables in existing databases, those that are explicit (or defined) and those that are implicit (or undefined.) The explicit relationships are defined differently in each database management system, so finding these relationships will depend on which type of database you're using. Typically they can be found via the user interface when designing one of the two tables in the relationship, viewing a relationship option, or by applying SQL against specific system tables. The explicit relationships usually enforce referential integrity in the database, so they are strongly encouraged over implicit relationships, but still implicit relationships will be found in the real world in existing databases. Implicit relationships are relationships where the primary key in one table can be clearly identified in another table as a foreign key, but there is no explicit relationship defined. Because the name of the foreign key matches or is similar in pattern to the the the primary key in the other table, you can imply that there should be a relationship between those tables. These relationships can be identified by foreign key names and by looking at existing SQL and queries in the database system to see what fields tables are joined on.
What is the most common type of relationship between tables in a relational database?
one-to-many relationship
Difference between database and relational database?
A relational database is a type of database, so in one sense there is no difference. There are various kinds of database. A relational database is one type. Others include network and hierarchical.
What are the difference between hierarchical database and network database?
what is the difference between hirarchical,network and relational database model?
Relationship between a database and a table?
A table is contained within the database and consists of columns and rows. A table is meant to store data and, in relational databases, are related to other tables within the same database.
Difference between database and relational database explain with example?
Database = Generic name for a system to store data Relational Database = A specific type of database that utilizes relationships between data to not only store the data but further its efficiency in its manipulation.
What is the difference between sybase and rdbms?
An RDBMS is a general term for a relational database system and Sybase is a specific product which implements a relational database.
What are the differences between database management system Vs relational dbms?
the database management system analysis the data or record but relational database management system links the database to each other.
Find out functional dependencies?
A constraint between two sets of attributes is known as functional dependency in relational database. Determination of functional dependencies is vital in database denormalization, normalization and relational model.
Are there any major similiarities between object oriented databases and relational databases?
In a Object Oriented Database, information is given in the form of objects as used in programming languages. "When database capabilities are combined with object programming language capabilities, the result is an object database management system (ODBMS). An ODBMS makes database objects appear as programming language objects in one or more object programming languages." (http://en.wikipedia.org/wiki/Object_database)"A relational database is a database that conforms to the relational model, and refers to a database's data and schema (the database's structure of how those data are arranged). Common usage of the term "Relational database management system" technically refers to the software used to create a relational database, but sometimes mistakenly refers to a relational database." (http://en.wikipedia.org/wiki/Relational_database)
Differences between relational database management system and database management system?
hi so did u actually figure out some thing!
When would you want to use a relational database?
The word 'relational' in an RDBMS stands for relationships between tables (parent and child). So whenever you have information that can benefit from such a feature you would use relational database. For example, a customer places many orders and each order has items. This type of real world scenario is better represented in a database than in a spreadsheet for example.
What is the differene between Oracle and database?
Oracle is a database. Oracle is a Relational Database Management System which is a specialized implementation of a database. It is designed to hold data that is related to one another and organized in the form of schemas and tables.
