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Covers high-level conceptual modeling, ER diagrams and diagrammatic notation, then walks through requirements collection, conceptual/logical design, physical design, and external/view design. Uses a sample COMPANY database to discuss entities, attributes, entity sets, attribute categories, and key versus multivalued fields. Includes an initial ER diagram description and treatment of weak entity types and identifying relationships.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/the-entity-relationship-er-model-chapter-7-lecture-outline-database-design-steps/655987/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/the-entity-relationship-er-model-chapter-7-lecture-outline-database-design-steps/655987.png","ImageObject",300,407,{"name":92,"@type":93},"Kyle","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-02","2026-10-25",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What are the main components described by the ER model?","Question",{"text":112,"@type":113},"The ER model describes data using entities and entity sets, objects, relationships and relationship sets, connections between objects, and attributes and their properties.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What steps are included in the database design process?",{"text":117,"@type":113},"Database design includes requirements collection and analysis, conceptual or logical DB design, physical DB design, and external or view design.",{"name":119,"@type":110,"acceptedAnswer":120},"How does the example COMPANY database specify entities and attributes?",{"text":121,"@type":113},"The example lists employees, departments, projects, and dependents, with employee attributes including name, Social Security number, address, salary, sex (gender), and birth date, and it notes multivalued attributes such as Works_on and Locations.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},655987,1793051360,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":34,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},3985741905716,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","THE ENTITYRELATIONSHIP (ER) MODEL  \nCHAPTER 7 (6/E)  \nCHAPTER 3 (5/E)  \nLECTURE OUTLINE  \n􀂃 Using High-Level, Conceptual Data Models for Database Design  \n􀂃 Entity-Relationship (ER) model  \n• Popular high-level conceptual data model  \n􀂃 ER diagrams  \n• Diagrammatic notation associated with the ER model  \n2  \nSTEPS IN DATABASE DESIGN  \n􀂃 Requirements collection and analysis  \n• DB designers interview prospective DB users to understand and document data requirements  \n• Data requirements  \n• Functional requirements of the principal applications  \n􀂃 Conceptual or logical DB design  \n• Description of data requirements  \n• Detailed descriptions of components and constraints  \n• Transformed into implementation data model  \n• Result: DB schema in implementation data model of DBMS  \n􀂃 Physical DB design  \n• Internal storage structures, file organizations, indexes, access paths, and physical design parameters for the DB files  \n􀂃 External or view design  \n3  \nA SAMPLE DATABASE APPLICATION  \n􀂃 Requirements gathered for COMPANY  \n• Employees, departments, and projects  \n• Company is organized into departments  \n• Department controls several projects  \n• Employee: require each employee’s name, Social Security number, address, salary, sex (gender), and birth date  \n• Keep track of the dependents of each employee  \n4  \nER MODEL OVERVIEW  \n􀂃 ER model describes data in terms of:  \n• Entities and entity sets  \n• Objects  \n• Relationships and relationship sets  \n• Connections between objects  \n• Attributes  \n• Properties that characterize or describe entities or relationships  \n5  \nENTITIES AND ATTRIBUTES EXAMPLE  \n6  \nENTITY SETS  \n􀂃 Entity type or set  \n• Collection (or set) of similar entities that have the same attributes  \n􀂃 ER model defines entity sets, not individual entities  \n􀂃 But entity sets described in terms of their attributes  \n7  \nCATEGORIES OF ATTRIBUTES  \n􀂃 Simple (atomic) vs. composite attributes  \n􀂃 Single-valued vs. multivalued attributes  \n􀂃 Stored vs. derived attributes  \n􀂃 Key or unique attributes  \n• Attribute values constrained to be distinct for individual entities in entity set  \n8  \nINITIAL ER DIAGRAM FOR COMPANY  \n􀂃 Four entity types  \n􀂃 Most attributes are simple, single-valued, and stored  \n• Works_on and Locations are multivalued  \n• Employee’s Name is composite  \n􀂃 Employee has one key, department and project have two keys, dependent has none  \n9  \nWEAK ENTITY TYPES  \n􀂃 Entity types that do not have key attributes of their own  \n• Identified by their relationship to specific entities from another entity  \ntype  \n• Dependent is meaningless in COMPANY DB independently of Employee  \n• Identified by relationship to Employee  \n• Dependent_name distinguishes one dependent from other dependents for the same employee: partial key  \n􀂃 Identifying relationship  \n• Relates a weak entity type to the identifying entity, which has therest of the key  \n11","cbCaimILXvLcTEKK","https://ap.wps.com/l/cbCaimILXvLcTEKK","pdf",788857,25,"English","# Lecture Outline\n## Using High-Level Conceptual Data Models for Database Design\n## Entity-Relationship (ER) Model and ER Diagrams\n# Steps in Database Design\n## Requirements Collection and Analysis\n## Conceptual or Logical DB Design\n## Physical DB Design\n## External or View Design\n# A Sample Database Application\n## Requirements for COMPANY\n# ER Model Overview\n## Entities, Relationships, Attributes\n# Entities and Attributes Example\n## Entity Sets\n## Categories of Attributes\n# Initial ER Diagram for COMPANY\n## Four Entity Types and Attribute Properties\n# Weak Entity Types\n## Identifying Relationships","[{\"question\":\"What are the main components described by the ER model?\",\"answer\":\"The ER model describes data using entities and entity sets, objects, relationships and relationship sets, connections between objects, and attributes and their properties.\"},{\"question\":\"What steps are included in the database design process?\",\"answer\":\"Database design includes requirements collection and analysis, conceptual or logical DB design, physical DB design, and external or view design.\"},{\"question\":\"How does the example COMPANY database specify entities and attributes?\",\"answer\":\"The example lists employees, departments, projects, and dependents, with employee attributes including name, Social Security number, address, salary, sex (gender), and birth date, and it notes multivalued attributes such as Works_on and Locations.\"}]","THE ENTITY-RELATIONSHIP (ER) MODEL - Chapter 7 - Lecture Outline - Database Design Steps | PDF",1792965382,63]