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Apr 9, 2013 · I am trying to show the following in the ER diagram: There are instructors and courses, a course is taught by only one instructor whereas an instructor can give many courses. My question is, is ...
Apr 18, 2021 · I was using erdplus.com to create an E/R diagram and generate relational tables from that, and then generate the SQL code to create a database from those tables. It looked like a solid tool. But wh...
Question: 1. Representation Using Visio, ERDPlus, or Lucid Chart, construct an Entity Relationship Diagram (ERD) describing the structure of the database. Be sure to label all the primary and foreign keys as well as the relationship. Paste the ERD below. 2.
Jun 26, 2016 · As i know optionality means the minimum cardinality of a relationship which is denoted as optional to optional, mandatory to optional, mandatory to mandatory.. And Participation denoted as bold l...
Apr 16, 2017 · i am having a hard time creating an ERD for my table relationship. I have 4 tables: film, ticket_type, studio, and schedule. The schedule table is a relationship table that contain the primary key ...
@Matthias: Mmmmm. No. All my work complies strictly with IDEF1X standard. The problem is, you cannot learn the methodology from a standard (declaration), as in, you cannot learn to be a chef from a cookbook; you have to know methodology and have some experience with it, fix messes, appreciate the value of a standard, then learn the standard and improve/comply.
in ERDplus a label:is optional.should not refer to specific entities.is required.must not contain cardinality information. Your solution’s ready to go! Enhanced with AI, our expert help has broken down your problem into an easy-to-learn solution you can count on.
Mar 9, 2024 · I am currently facing the challenge of modeling a composite primary key. Here's an example: tblObjekt: Objekt_ID objektTyp (raw material, assembly, finished product) business year month ==> The
Jan 6, 2021 · Assuming the relationship is mandatory (as you said, a person has to be a student or a teacher) and disjoint (a person is either a student or a teacher, but not both), the best solution is with 2 tables, one for students and one for teachers.
@ShamsulArefin The notion that a relationship needs to be "resolved" via the creation of an artificial entity between the two kernel entities originated in models of data in which only entity had attributes and relationships were mere binary associations (e.g. the network data model).
