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What is the most common type of relationship you will encounter between tables?
Wiki User
∙ 12y ago
one-to-many relationships
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoOne to Many relationship
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What is the most common type of relationship between tables in a relational database?
one-to-many relationship
How are relationship between tables expressed in a relational database?
Tables are the basic building blocks of a relational database.
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.
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 do you mean by Infer implicit relationships across data?
I think this type of inference is by looking at the data, i.e., there is no real relationship between the tables (through Primary and Foreign keys), but when you analyze the data in a table you are able to infer that there is a relationship.
What is the most common type of relationship between tables in a relational database?
one-to-many relationship
If a relationship is established between two tables they will share a common?
yes they need to have a commmon field
How are relationship between tables expressed in a relational database?
Tables are the basic building blocks of a relational database.
What role does a foreign key play in the establishment of a relationship between two entities or tables?
A foreign key is a relationship or link between two tables which ensures that the data stored in a database is consistent.
In order for two tables to have a relationship they must contain a common?
The must have a topic or object that is the same!
What happen when you delete foreign key?
You will lose the connection between the tables and break the relationship.
The purpose of the primary key in building the relationship between tables?
primary keys are unique
How many relations may exist between two tables in a MS Access database?
only one relationship can exists between two tables in the MS ACCESS software
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.
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 referential?
Referential Integrity is a set of rules that a DBMS (Database management system) follows to ensure that there are matching values in the common field used to create the relationship between related tables and that protects the data in related tables to make sure that data is not accidentally deleted or changed.
What are Joins in dbms?
A join is a temporary relationship that you can create between two tables in a database query that do not already have an established relationship or common field with the same fieldname or data type. Database tables that are joined in a query are related in that query only, and nowhere else. The type of join that you use indicates which records the query will select or perform the chosen actions on.
