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Nested set model

The nested set model is a technique for representing nested set collections (also known as trees or hierarchies) in relational databases.

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Overview

Motivation

Technique

Performance

Drawbacks

Advanced semantic analysis

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Map overview Semantic statistics

Nested set model

Nodes36
Edges35
Triples38
Avg. degree1.94
Density0.055556
Components1

How this topic connects Entity context

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Nested set model

Top relations

related to Drawbacks · 18
Nested set model → As, Attributes, Cars, DB, Depth, For, Given, If, Mercedes, Oak, Plants, SQL, SQL Antipatterns, The, The Nested Set, Therefore, Trees, Vehicles
related to Motivation · 7
Nested set model → An, If, Joe Celko, SQL, The, This, When
related to Technique · 5
Nested set model → Querying, Refinements, The, This, Updating
related to Variations · 4
Nested set model → For, Or, SQL, Using
is a · 2
Nested set model → solution to that problem.An alternative solution is the expression of the hierarchy as a parent-child relation, technique for representing nested set collections

Important terminology Word statistics

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Important terminology

model nested tree hierarchy relational sql table set depth node given problem also hierarchies operations data query must numbers attributes

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Nested set modelis atechnique for representing nested set collections0.90text
Nested set modelis asolution to that problem.An alternative solution is the expression of the hierarchy as a parent-child relation0.90text
comparing the contents of hierarchies of two elementsinstance ofthe adjacency list model does not allow the expression of operations0.80text
or determining whether an element is somewhere in the subhierarchy of another elementinstance ofthe adjacency list model does not allow the expression of operations0.80text
Nested set modelrelated to DrawbacksThe0.60section
Nested set modelrelated to DrawbacksThe Nested Set0.60section
Nested set modelrelated to DrawbacksGiven0.60section
Nested set modelrelated to DrawbacksVehicles0.60section
Nested set modelrelated to DrawbacksCars0.60section
Nested set modelrelated to DrawbacksMercedes0.60section
Nested set modelrelated to DrawbacksAttributes0.60section
Nested set modelrelated to DrawbacksIf0.60section

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    Min side: 3
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