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Nest of tables (also known as nested tables, nesting tables) is a set of few tables with progressively smaller heights and frames, so that they can be stacked when not in use. [1] A smaller table slides inside the frame of a larger one until it engages the edge of the back frame. [2] Typically a set contains three (trio) or four (quartetto ...
The Nested Set model is appropriate where the tree element and one or two attributes are the only data, but is a poor choice when more complex relational data exists for the elements in the tree. Given an arbitrary starting depth for a category of 'Vehicles' and a child of 'Cars' with a child of 'Mercedes', a foreign key table relationship must ...
C suffers from the disadvantage that it does not reach a maximum of 1.0, notably the highest it can reach in a 2 × 2 table is 0.707 . It can reach values closer to 1.0 in contingency tables with more categories; for example, it can reach a maximum of 0.870 in a 4 × 4 table.