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

  • Twisted Pair
    A twisted pair consists of two insulated strands of copper wire, twisted together. When ...
  • Modem
    Modem is a device that converts digital signals into analog and back. An abbreviation ...
  • Bit
    Bit is an electronic signal that denotes a zero or a one; the smallest unit of representation ...
  • Group decision support systems (GDSS)
    Group decision support systems (GDSS) are a set of interactive, well-integrated systems ...
  • Interrelated problem
    Interrelated problems are problems whose solutions are interrelated ...