Loading Icon

Hierarchical database model

A hierarchical database model is a data model in which the data are organized into a tree-like structure. The data are stored as records which are connected to one another through links. A record is a collection of fields, with each field containing only one value. The type of a record defines which fields the record contains.

Metrics Summary

Total Publications
Lifetime
4,070
Prior Five Years
1,000
Total Citations
Lifetime
102,052
Prior Five Years
7,017
Total Scholars
Lifetime
7,245
Prior Five Years
5,998

Institutional Rankings

Global (Worldwide)
Academic Institutions
Lifetime
Academic Institutions
Prior Five Years
Non-academic Institutions
Lifetime
#1
United Kingdom
#1
Canada
#1
#2
United States
#2
United States
#2
United States
#3
United States
#3
United Kingdom
#3
United States
#4
United States
#4
United States
#5
United States
#5
Denmark
#6
Canada
#6
China
#7
United States
#8
United States
#9
United States
#10
United States
Show More
National Institutional Rankings

Publications and Citation History

Publications based on Disciplines

Scholars based on Disciplines

Publications based on Fields

Scholars based on Fields

Highly Ranked Scholars™

Lifetime
Prior Five Years

Highly Cited Publications

Lifetime