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  2. Many-to-many (data model) - Wikipedia

    en.wikipedia.org/wiki/Many-to-many_(data_model)

    For example, think of A as Authors, and B as Books. An Author can write several Books, and a Book can be written by several Authors. In a relational database management system, such relationships are usually implemented by means of an associative table (also known as join table, junction table or cross-reference table), say, AB with two one-to-many relationships A → AB and B → AB.

  3. Cosmos DB - Wikipedia

    en.wikipedia.org/wiki/Cosmos_DB

    five different compatibility APIs, exposing endpoints that are partially compatible with the wire protocols of MongoDB, Gremlin, Cassandra, Azure Table Storage, and etcd; these compatibility APIs make it possible for any compatible application to connect to and use Cosmos DB through standard drivers or SDKs, while also benefiting from Cosmos DB ...

  4. MongoDB - Wikipedia

    en.wikipedia.org/wiki/MongoDB

    MongoDB provides high availability with replica sets. [33] A replica set consists of two or more copies of the data. Each replica-set member may act in the role of primary or secondary replica at any time. All writes and reads are done on the primary replica by default.

  5. Join (SQL) - Wikipedia

    en.wikipedia.org/wiki/Join_(SQL)

    An inner join (or join) requires each row in the two joined tables to have matching column values, and is a commonly used join operation in applications but should not be assumed to be the best choice in all situations. Inner join creates a new result table by combining column values of two tables (A and B) based upon the join-predicate.

  6. Join count statistic - Wikipedia

    en.wikipedia.org/wiki/Join_count_statistic

    Left: each category never has a neighbour of its own type, resulting in zeros on the diagonal. Centre: random pattern shows no bias for pairing colours, resulting in approximately equal values for all join count statistics. Right: Since different types are only adjacent on the edge of the patches this results in small values for . When there ...

  7. Join - Wikipedia

    en.wikipedia.org/wiki/Join

    Join may refer to: Join (law), to include additional counts or additional defendants on an indictment; In mathematics: Join (mathematics), a least upper bound of sets orders in lattice theory; Join (topology), an operation combining two topological spaces; Join (sigma algebra), a refinement of sigma algebras

  8. Combinatoriality - Wikipedia

    en.wikipedia.org/wiki/Combinatoriality

    This breaks the aggregate into two smaller pieces, thus making it easier to sequence notes, progress between rows or aggregates, and combine notes and aggregates. The principal forms, P1 and I6, of Schoenberg's Piano Piece , op. 33a, tone row feature hexachordal combinatoriality and contains three perfect fifths each, which is the relation ...

  9. Thermoelectric effect - Wikipedia

    en.wikipedia.org/wiki/Thermoelectric_effect

    At the atomic scale, a temperature gradient causes charge carriers in the material to diffuse from the hot side to the cold side. This is due to charge carrier particles having higher mean velocities (and thus kinetic energy) at higher temperatures, leading them to migrate on average towards the colder side, in the process carrying heat across the material.