Component of ER Diagram:<\/strong><\/p>\n

<\/strong><\/p>\n

Entity<\/strong><\/p>\n

\n
• In an ER Diagram, Entity is represented as rectangles.<\/li>\n
• An entity may be any object, class, person or place.<\/li>\n<\/ul>\n

  Attribute<\/strong><\/p>\n

  \n
  • In an ER diagram attributes are represented using eclipse.<\/li>\n
  • Attribute describes the property of an entity.<\/li>\n<\/ul>\n

    Relationship<\/strong><\/p>\n

    \n
    • Relationship are represented in an er diagram by diamond or rhombus.<\/li>\n
    • It is used to represent the relationship between entities.<\/li>\n<\/ul>\n

      Types of Relationship<\/strong><\/h3>\n

      One to one relationship<\/strong><\/p>\n

      \n
      • When only one instance of an entity is associated with an relationship is known as one to one relationship.<\/li>\n<\/ul>\n

        <\/p>\n

        One to many Relationship<\/strong><\/p>\n

        \n
        • When only one instance of entity in the left is associated with more than one instance on the right is called one to many relationship.<\/li>\n<\/ul>\n

          <\/p>\n

          Many-to-one relationship<\/strong><\/p>\n

          \n
          • When more than one instance of entity in the left is associated with only one instance on the right associates with the relationship is called many to one relationship.<\/li>\n<\/ul>\n

            <\/p>\n

            Many-to-many relationship<\/strong><\/p>\n

            \n
            • When more than one instance of entity in the left is associated with more than one instance on the right associates with the relationship is called many to many relationship<\/li>\n<\/ul>\n

              <\/p>\n","protected":false},"excerpt":{"rendered":"

              ER stands for Entity-Relationship model. It is a high level data model. If any data elements or relationship of any specified system can defined using this model. Conceptual design for database is developed in this model. Design view of data is very simple and easy to develop. Structure of the database is shown as a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"passster_activate_protection":false,"passster_protect_child_pages":"","passster_protection_type":"password","passster_password":"","passster_activate_overwrite_defaults":"","passster_headline":"","passster_instruction":"","passster_placeholder":"","passster_button":"","passster_id":"","passster_activate_misc_settings":"","passster_redirect_url":"","passster_hide":"no","passster_area_shortcode":"","gtb_hide_title":false,"gtb_wrap_title":false,"gtb_class_title":"","gtb_remove_headerfooter":false,"footnotes":""},"categories":[7157],"tags":[17579,17568,17575,17569,17571,17580,17577,17573,17578,17567,17570,17574,17576,17572],"class_list":["post-4484","post","type-post","status-publish","format-standard","hentry","category-dbms","tag-components-of-er-model","tag-dbms-er-model-concept","tag-entity-in-dbms","tag-entity-relationship-diagram","tag-entity-relationship-diagram-model","tag-er-diagram-examples-with-solutions-in-dbms","tag-er-diagram-in-dbms-examples","tag-er-model-in-dbms","tag-features-of-er-model-in-dbms","tag-introduction-of-er-model","tag-what-is-an-entity-relationship-model-in-dbms","tag-what-is-entity-relationship-diagram-erd","tag-what-is-er-diagram","tag-what-is-er-modeling"],"yoast_head":"\n