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- Many-to-many_(data_model) abstract "In systems analysis, a many-to-many relationship is a type of cardinality that refers to the relationship between two entities (see also entity–relationship model) A and B in which A may contain a parent row[clarify] for which there are many children[clarify] in B and vice versa. For instance, think of A as Authors, and B as Books. An Author can write several Books, and a Book can be written by several Authors. Because most database management systems only support one-to-many relationships, it is necessary to implement such relationships physically via a third junction table (also called cross-reference table), say, AB with two one-to-many relationships A -> AB and B -> AB. In this case the logical primary key for AB is formed from the two foreign keys (i.e. copies of the primary keys of A and B).In web application frameworks such as CakePHP and Ruby on Rails, a many-to-many relationship between database tables in a model is sometimes referred to as a HasAndBelongsToMany (HABTM) relationship.".
- Many-to-many_(data_model) thumbnail CPT-Databases-ManytoMany.svg?width=300.
- Many-to-many_(data_model) wikiPageExternalLink dbdesign.php?page=manymany.php.
- Many-to-many_(data_model) wikiPageID "13317605".
- Many-to-many_(data_model) wikiPageRevisionID "594029415".
- Many-to-many_(data_model) hasPhotoCollection Many-to-many_(data_model).
- Many-to-many_(data_model) subject Category:Data_modeling.
- Many-to-many_(data_model) comment "In systems analysis, a many-to-many relationship is a type of cardinality that refers to the relationship between two entities (see also entity–relationship model) A and B in which A may contain a parent row[clarify] for which there are many children[clarify] in B and vice versa. For instance, think of A as Authors, and B as Books. An Author can write several Books, and a Book can be written by several Authors.".
- Many-to-many_(data_model) label "Many-to-many (data model)".
- Many-to-many_(data_model) label "N para N".
- Many-to-many_(data_model) sameAs N_para_N.
- Many-to-many_(data_model) sameAs m.03c1ldz.
- Many-to-many_(data_model) sameAs Q3058002.
- Many-to-many_(data_model) sameAs Q3058002.
- Many-to-many_(data_model) wasDerivedFrom Many-to-many_(data_model)?oldid=594029415.
- Many-to-many_(data_model) depiction CPT-Databases-ManytoMany.svg.
- Many-to-many_(data_model) isPrimaryTopicOf Many-to-many_(data_model).
