Questions tagged [relational-database]

A relational database is a structured collection of relation variables, sometimes referred to as relvars, R-tables, or simply tables. The principles governing relational databases involve defining, manipulating, and enforcing integrity rules based on relational operations inspired by Relational Algebra and Calculus. These fundamental concepts play a significant role in both the theory and practical application of data management.

Retrieving data from a MySQL database and displaying it in a dropdown select menu

I'm running into a problem with a select menu on PHP. I've been attempting to populate the select menu from a MySQL database, but it's not showing up at all. Here's the snippet of my code: default: mysql_select_db($databas ...

phpmysqlsessionrelational-database

Navigating the complexities of the MySql relational database system

I have been attempting to utilize PHP to showcase all the outcomes from the MySql NOTES table that correspond with specific NAME in QUOTES table. The goal is to exhibit all the COMMENTS listed under each particular NAME. QUOTES table columns: ID / NAME / ...

phpmysqlrelational-database

How should I organize mySQL code within a nodejs application?

Lately, I've been working on a project and utilizing node.js as my backend. Instead of using MongoDB, I've opted for MySQL as my DBMS due to specific requirements in my project. However, I'm facing challenges in structuring my MySQL queries effectively and ...

mysqlsqlnode.jsexpressrelational-database

What is the best method for extracting information from multi-valued attributes in a relational database?

I have a database with 4 tables (Student, Course, Module, Instructor) and I want to confirm if this database is correct. If it is, how can I retrieve data from the tables using student ID as shown below. What are the modules for student 10122342? >>Expec ...

phpmysqldatabasedatabase-designrelational-database