Entity-relationship Questions

When i try to follow the instruction here

I am building an api and i have few models which have a relationship with each other: asset location user i am

I've been setting a orders system for a laravel 5.8 app but i presume i've overcomplicated (or not) the db architecture for the orders system.

I have two tables article and faq ( frequently asked questions ). i'm trying to establish a relationship between these

I have a problem to query such design

So my intention here is to make the "employee" contain 2 references to the same primary key in the

I'm sitting with a little headache about a problem right now. i have two entities payment order and account

I have a problem with ios core data and many to many relations. i want to write a fitness application. so i need three tables. following

I know for a recursive relation where there are 2 roles, for example: worker works for manager and worker and

Hello so i have many to many relation between question [table name: tblquestion, id: que_id] and agecategory

This question is about relational databases like postgresql or oracle. the following is a toy example of my problem. say i have five tables

I know this might sound a bit ridiculous, but i got a doubt that if we can represent relationship between two tables, how the two table's data is

I am trying to complete a question for one of my courses, and it revolves around which relationship is the best solution - binary or ternary.

Say i have 2 relations: user and location which is connected by the relation going to. now, going

There exists an entity x with two attributes, a and b. the er model so far has one table: [_x_| a | b ] now the

I've been working on an er diagram for university project. it is about transport company. that company does particular jobs for other companies

I try to understand er diagrams and i came across an example that i'm not sure how to "look" at it.. consider this diagram:

I'm having trouble understanding the difference between a ternary relationship like this :

So i'm beginning to struggle with doctrine2 when it comes to a many-to-many relation for a project where the relation has 1 extra column.

I am trying to build a java based web application using spring boot and rest architecture using spring mvc for the following purpose:

In enhanced er modelling subclass inheriting from more than 1 super-class is called multiple inheritance! please explain me this using a

Is it possible/right to have a a relation between tables that only goes one way? i have an invoices table that i

I have a users table and a groups table. i have set up a many to many users/groups relations. when i run $users =

I have a relationship between three models in my laravel application, user model has many pages and pages has many