{"id":3620,"date":"2023-03-01T12:00:56","date_gmt":"2023-03-01T17:00:56","guid":{"rendered":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/?p=3620"},"modified":"2023-03-01T12:00:56","modified_gmt":"2023-03-01T17:00:56","slug":"how-do-erds-show-relationships-2a","status":"publish","type":"post","link":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/2023\/03\/01\/how-do-erds-show-relationships-2a\/","title":{"rendered":"How do ERDs show relationships? 2A"},"content":{"rendered":"

ERDs are used to take complex data relationships and display them in a simplified diagram. This can help people see the way entities relate to one another and how data is transferred. There are two types of ERDs (Chen and Crow’s Foot). In Chen’s diagram there are three symbols: rectangle (entity), oval (attributes), and diamond (relationships). In Crow’s Foot diagram, the symbols are a rectangle with a header that entails the entity and underneath there is a list of the attributes. To display relationships, there are arrows that are labeled with the relationship between the entities. There are various arrows that mark the cardinality between entities, one-to-one relationship, one-to-many, and many-to-one.\u00a0 There’s also one to zero to one, one to zero to many and many to zero to one. These arrows represent if a transaction is not completed. ERDs are useful to display how data is relayed through a series of entities.<\/p>\n

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ERDs are used to take complex data relationships and display them in a simplified diagram. This can help people see the way entities relate to one another and how data is transferred. There are two types of ERDs (Chen and Crow’s Foot). In Chen’s diagram there are three symbols: rectangle (entity), oval (attributes), and diamond […]<\/p>\n","protected":false},"author":29449,"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-3620","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\/mis2101sec730spring2023\/wp-json\/wp\/v2\/posts\/3620","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/users\/29449"}],"replies":[{"embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/comments?post=3620"}],"version-history":[{"count":2,"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/posts\/3620\/revisions"}],"predecessor-version":[{"id":3656,"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/posts\/3620\/revisions\/3656"}],"wp:attachment":[{"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/media?parent=3620"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/categories?post=3620"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/community.mis.temple.edu\/mis2101sec730spring2023\/wp-json\/wp\/v2\/tags?post=3620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}