What is the meaning of relation in database?

Question

A relation in a database means a 'TABLE'. As we all know, tables are something which is made up of rows and columns, a relation in database will also have rows and columns. Each row is called a tuple. Each column is called an attribute or field.

What is relation in a database?

In relational database theory, a relation, as originally defined by E. F. Codd, is a set of tuples (d, d, ..., d), where each element d is a member of D, a data domain.

Why is relation in database?

Database relationships are associations between tables that are created using join statements to retrieve data. The following table describes the database relationships. Both tables can have only one record on each side of the relationship. Each primary key value relates to none or only one record in the related table.

What is in a relation?

A relation between two sets is a collection of ordered pairs containing one object from each set. If the object x is from the first set and the object y is from the second set, then the objects are said to be related if the ordered pair (x,y) is in the relation.

What is Realtion in DBMS?

A relationship in a DBMS, is primarily the way two or more data sets are linked. This is so true for Relational Database Management Systems. One dataset may be then termed as the Foreign key and the ones linked to it may be termed as the Primary Key. There may be multiple Foreign and Primary keys linked to each other.

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