https://github.com/marta-barea/training-centers-sql
An SQL project built around a fictional training center database, used to explore essential query techniques and database structures with MySQL.
https://github.com/marta-barea/training-centers-sql
mysql mysql-database sql
Last synced: 2 months ago
JSON representation
An SQL project built around a fictional training center database, used to explore essential query techniques and database structures with MySQL.
- Host: GitHub
- URL: https://github.com/marta-barea/training-centers-sql
- Owner: Marta-Barea
- License: gpl-3.0
- Created: 2025-06-24T17:30:19.000Z (4 months ago)
- Default Branch: main
- Last Pushed: 2025-06-24T17:49:52.000Z (4 months ago)
- Last Synced: 2025-06-24T18:41:46.563Z (4 months ago)
- Topics: mysql, mysql-database, sql
- Language: Makefile
- Homepage:
- Size: 30.3 KB
- Stars: 0
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# SQL Project - Training Center Database
This repository contains an SQL project built around a fictional **training center database**, used to explore essential query techniques and database structures with MySQL.
---
# How to use
1. Clone the repository
```bash
git clone https://github.com/yourusername/trining-ceneters-sql.git
cd trining-ceneters-sql
```
2. Set your credentials in .env
Create a file named `.env` with your database credentials:
```dotenv
MYSQL_ROOT_PASSWORD=your_password
MYSQL_PORT=mysql_port_here
MYSQL_HOST=127.0.0.1
MYSQL_DATABASE=training_centers
MYSQL_USER=your_user
MYSQL_PASSWORD=your_password
```
3. Start de Project
Make sure [Docker](https://www.docker.com) is running, then run:
```bash
docker-compose up -d
make all-insert
```
This will:
- Launch a MySQL 8.0 container
- Create the database
- Generate the schema
- Insert fictional data
- Run all queries in `queries/`
- Export results as .csv files in `results/`
# Requirements
- [Docker](https://www.docker.com/products/docker-desktop)
- [Docker Compose](https://docs.docker.com/compose/)
- `make`(preinstalled on macOS/Linux)
# Project Structure
```
training-centers-sql/
├── .env
├── .gitignore
├── .dockerignore
├── Makefile
├── docker-composo.yaml
├── README.md
├── schema/
│ ├── create_tables.sql
│ ├── insert_sample_data.sql
│ └── load_data.sql
├── data/
│ ├── centers.csv
│ └── courses.csv
├── queries/
│ ├── 01_active_courses.sql
│ ├── 02_distinct_categories.sql
│ ├── ...
└── results/
├── 01_active_courses.csv
├── 02_distinct_categories.csv
└── ...
```
# Queries Overview
| Query | Description |
|----------------------------------------|-----------------------------------------------------------------------------|
| `01_cheapest_course.sql` | Selects courses with a defined price, sorted ascendingly |
| `02_distinct_categories.sql` | Lists unique course categories |
| `03_courses_by_level_and_duration.sql` | Filters beginner/intermediate courses with 20–40 hours |
| `04_courses_with_missing_prices.sql` | Selects courses where price is not null |
| `05_courses_related_to_sql.sql` | Finds courses with "SQL" in their name |
| `06_price_categories.sql` | Categorizes price ranges using CASE WHEN |
| `07_courses_under_150_or_free.sql` | Filters courses under 150 or with free label |
| `08_duration_in_days.sql` | Converts course hours to days (8h/day assumption) |
| `09_filter_by_category_and_level.sql` | Selects non-advanced courses in specific categories |
| `10_courses_with_safe_prices.sql` | Uses COALESCE to display 'Pending' for null prices |
| `11_avg_price_by_category.sql` | Calculates average course price per category |
| `12_courses_count_by_level.sql` | Counts how many entries there are per course level |
| `13_avg_duration_by_center.sql` | Calculates average course duration by training center |
| `14_categories_with_multiple_courses.sql`| Finds categories offering two or more courses |
| `15_centers_with_multiple_courses.sql` | Finds centers offering at least one course |
| `16_avg_price_center.sql` | Calculates average course price per center |
| `17_data_categories_multiple_courses.sql`| Finds categories with multiple "Data"-related courses |
| `18_intermediate_hours_by_center.sql` | Sums duration of Intermediate-level courses per center |
| `19_course_levels_per_center.sql` | Counts how many courses each center offers per level |
| `20_centers_avg_price_above_100.sql` | Lists centers where the average course price exceeds 100 |
# Notes
All data is fictional and anonymized.