{"id":2449,"date":"2022-05-24T21:34:37","date_gmt":"2022-05-25T01:34:37","guid":{"rendered":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/?p=2449"},"modified":"2022-05-24T21:34:37","modified_gmt":"2022-05-25T01:34:37","slug":"what-is-an-erd","status":"publish","type":"post","link":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/2022\/05\/24\/what-is-an-erd\/","title":{"rendered":"What is an ERD?"},"content":{"rendered":"<p>An Entity Relationship Diagram, ERD, is a flowchart that demonstrates how entities (i.e: people, concepts, or objects) relate to one another within a system. ERDs may be used to model relationship data bases, in terms of business rules. ERDs are oftentimes the first initial step in determining the requirements of an information systems project. They are used to analyze existing databases, in order to resolves issues. By creating an ERD, the diagram is able to determine where an issue is occurring. ERD help in analyzing databases and modeling new data bases.\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1856\" src=\"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/02\/er-diagram-tool-draw-er-diagrams-online-gliffy-with-what-is-erd-diagram-300x210.jpg\" alt=\"\" width=\"300\" height=\"210\" srcset=\"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/02\/er-diagram-tool-draw-er-diagrams-online-gliffy-with-what-is-erd-diagram-300x210.jpg 300w, https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/02\/er-diagram-tool-draw-er-diagrams-online-gliffy-with-what-is-erd-diagram-1024x716.jpg 1024w, https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/02\/er-diagram-tool-draw-er-diagrams-online-gliffy-with-what-is-erd-diagram-768x537.jpg 768w, https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/02\/er-diagram-tool-draw-er-diagrams-online-gliffy-with-what-is-erd-diagram.jpg 1498w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>ERDs are made up of entities, relationships, and attributes. Entities may be a person, object, event, or concept&#8211; nouns, relationships are how entities are associated with one another, and attributes are characteristics of the entities.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2452 aligncenter\" src=\"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/05\/er-diagram-symbol-225x300.png\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/05\/er-diagram-symbol-225x300.png 225w, https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/files\/2022\/05\/er-diagram-symbol.png 600w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/p>\n<div class=\"mceTemp\">\u00a0<\/div>\n","protected":false},"excerpt":{"rendered":"<p>An Entity Relationship Diagram, ERD, is a flowchart that demonstrates how entities (i.e: people, concepts, or objects) relate to one another within a system. ERDs may be used to model relationship data bases, in terms of business rules. ERDs are oftentimes the first initial step in determining the requirements of an information systems project. They [&hellip;]<\/p>\n","protected":false},"author":28307,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[663943],"tags":[],"class_list":{"0":"post-2449","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-instructor","7":"entry"},"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/posts\/2449","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/users\/28307"}],"replies":[{"embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/comments?post=2449"}],"version-history":[{"count":1,"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/posts\/2449\/revisions"}],"predecessor-version":[{"id":2453,"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/posts\/2449\/revisions\/2453"}],"wp:attachment":[{"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/media?parent=2449"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/categories?post=2449"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec712summer2022\/wp-json\/wp\/v2\/tags?post=2449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}