{"id":5013,"date":"2022-10-26T06:10:29","date_gmt":"2022-10-26T06:10:29","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=5013"},"modified":"2022-10-26T06:10:29","modified_gmt":"2022-10-26T06:10:29","slug":"what-is-hierarchical-model-in-dbms","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/dbms\/what-is-hierarchical-model-in-dbms\/","title":{"rendered":"What is Hierarchical model in DBMS ?"},"content":{"rendered":"<h2 id=\"\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-5014 aligncenter\" src=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-in-dbms.jpg\" alt=\"\" width=\"647\" height=\"460\" srcset=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-in-dbms.jpg 647w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-in-dbms-300x213.jpg 300w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-in-dbms-390x277.jpg 390w\" sizes=\"(max-width: 647px) 100vw, 647px\" \/><\/h2>\n<h2 id=\"features-of-hierarchical-model\"><strong>Features of Hierarchical Model<\/strong><\/h2>\n<ul>\n<li>This model is based on the tree structure.<\/li>\n<li>This model contains a collection of records that are connected by each other by links.<\/li>\n<li>Tree structures that are used in these models are called as routed trees.<\/li>\n<li>The empty node of a tree is its root node.<\/li>\n<li>The hierarchical model is a collection of routed trees and the relationship that exists in the hierarchical model is one to many and one to one.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-5015 aligncenter\" src=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-dbms.png\" alt=\"\" width=\"1176\" height=\"658\" srcset=\"https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-dbms.png 1176w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-dbms-300x168.png 300w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-dbms-1024x573.png 1024w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-dbms-768x430.png 768w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-dbms-390x218.png 390w, https:\/\/www.wikitechy.com\/interview-questions\/wp-content\/uploads\/2022\/10\/hierarchical-model-dbms-820x459.png 820w\" sizes=\"(max-width: 1176px) 100vw, 1176px\" \/><\/p>\n<h2 id=\"advantages\"><strong>Advantages<\/strong><\/h2>\n<ul>\n<li>It is easy to understand.<\/li>\n<li>More efficient than the ER model.<\/li>\n<\/ul>\n<h2 id=\"disadvantages\"><strong>Disadvantages<\/strong><\/h2>\n<ul>\n<li>When a parent node is deleted, child node will also be deleted because of data inconsistency occurs.<\/li>\n<li>Stroage space is also wasted.<\/li>\n<li>Very complex to design.<\/li>\n<li>Structural Independence is not present.<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Features of Hierarchical Model This model is based on the tree structure. This model contains a collection of records that are connected by each other by links. Tree structures that are used in these models are called as routed trees. The empty node of a tree is its root node. The hierarchical model is a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7157],"tags":[18949,7238,7235,7248,17538,18948,18947,18946,18945],"class_list":["post-5013","post","type-post","status-publish","format-standard","hentry","category-dbms","tag-advantages-of-hierarchical-model-in-dbms","tag-hierarchical-data-structure","tag-hierarchical-database-model","tag-hierarchical-model-example","tag-hierarchical-model-in-dbms","tag-hierarchical-model-in-dbms-advantages","tag-hierarchical-model-with-examples","tag-what-is-a-hierarchical-database","tag-what-is-hierarchical-model-in-dbms"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Hierarchical model in DBMS ? - Hierarchical Data Model<\/title>\n<meta name=\"description\" content=\"What is Hierarchical model in DBMS ? - This model is based on tree structure. 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