When is it necessary to represent a many-to-many connection using an associative entity?
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When is it necessary to represent a many-to-many connection using an associative entity?
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Solved in 2 steps
- What kind of representation does a transaction identifier normally have in a dimensional model?How does the primary key of a connection relate to the interdependencies among its other qualities from the point of view of their usefulness?This article describes three situations when using a surrogate key instead of the connection key is allowed.
- An explanation of three situations in which it is acceptable to create a surrogate key for the primary key of a connection is provided.Three examples are given to illustrate when it is necessary to create a surrogate key in place of the primary key of a connection.What does the appearance of a transaction identifier look like in a dimensional model?
