December 2014
Intermediate to advanced
852 pages
17h 57m
English
Content preview from Joe Celko's SQL for Smarties, 5th Edition
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Chapter 27
Graphs in SQL
Abstract
Graphs are important because they are a general way to represent many different types of data and their relationships. SQL was not meant to be a graph language (there are graph databases today), but you can model graphs in SQL.
Keywords
Graph theory
Indegree
Outdegree
Adjacency list
John Gilson
Edge
Node
Tree
Directed graph
Acyclic graph
Nonreconvergent
Reconvergent
Reachable nodes
Source
Sink
Isolated nodes
Internal nodes
Path
Adjacency matrix
Taxi cab geometry
Equivalence class
Cliques
The terminology in graph theory pretty much explains itself; if it does not, you can read some of the books suggested in the appendix for graph theory. Graphs are important because they are a general way to represent many ...
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