The-definition.com

Definition

1-1(one-to-one), One-to-many (1-M), Many-to-Many (M-M)

1-1(one-to-one) is a relationship between two entities.

One-t- Many (1-M) is a relationship in which each node can have only one parent, but can have multiple children, that means an entity can have multiple relationships with other entitles in the database.

Many-to-many (M-M) is a relationship in which a record can have multiple parents and multiple children (every entity can be related to a number of entities).

Share it:  Cite

More from this Section

  • External strategic systems
    Systems that are used primarily by external entities in the business environment, such ...
  • Direct-access storage
    Direct-access storage, also known as random access, is a type of secondary storage in ...
  • Quality information systems
    Quality information systems are stand-alone or embedded systems that help an organization ...
  • Field
    Field refers to a meaningful group of characters or bytes. For example, Mary’s last ...
  • Microcomputer
    Microcomputer, also known as personal computer (PCs), is a compact, powerful, and versatile ...