January 2012
Intermediate to advanced
296 pages
5h 4m
English
Content preview from Joe Celko's Trees and Hierarchies in SQL for Smarties, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 12. Graphs in SQL
Generalized directed graphs are classified into nonreconvergent and reconvergent. In a reconvergent graph, multiple paths exist between at least one pair of nodes. Reconvergent graphs are either cyclic or acyclic.
Keywords: nonreconvergent, reconvergent, adjacency list model, recursive common table expressions, traveling salesman problem, adjacency matrix model, path end points, reachable nodes, edges, indegree, outdegree, source node, sink node, isolated node, internal node
The following section stresses other useful kinds of generalized directed graphs. Generalized directed graphs are classified into nonreconvergent and reconvergent. In a reconvergent graph, multiple paths exist between at least one pair of nodes. Reconvergent ...
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