https://github.com/markokolarski/computer_store_management_system

Java + Oracle SQL system for managing a computer store — products, orders, feedback, and inventory.
https://github.com/markokolarski/computer_store_management_system

computer-store data-modeling database inventory java jdbc oracle oracle-sql sql store-management

Last synced: about 1 month ago
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Java + Oracle SQL system for managing a computer store — products, orders, feedback, and inventory.

• Host: GitHub
• URL: https://github.com/markokolarski/computer_store_management_system
• Owner: MarkoKolarski
• Created: 2025-04-10T22:23:21.000Z (about 1 month ago)
• Default Branch: main
• Last Pushed: 2025-04-10T23:53:10.000Z (about 1 month ago)
• Last Synced: 2025-04-12T03:59:09.989Z (about 1 month ago)
• Topics: computer-store, data-modeling, database, inventory, java, jdbc, oracle, oracle-sql, sql, store-management
• Language: Java
• Homepage:
• Size: 241 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# 💻 Computer Store Management System

## 📘 Project Description

The **Computer Store Management System** is a database-driven Java application designed to manage the operations of a computer store efficiently. It includes a complete set of functionalities for managing products, customers, orders, invoices, feedback, suppliers, and warehouses. The system is built using **Oracle SQL** for database management and **Java (JDBC)** for application logic and connectivity.

---

## 🚀 Features

- **Product Management**: Administer various product types such as desktop computers, components, and peripherals.

- **Customer Management**: Store customer profiles and track their purchase history.

- **Order Management**: Manage shopping carts, order statuses, and invoices.

- **Feedback System**: Collect customer reviews and ratings for products.

- **Supplier and Warehouse Management**: Monitor suppliers, warehouse stock levels, and deliveries.

---

### 🔁 Triggers

Custom triggers are implemented to ensure data integrity and enforce business rules, such as:

- Validating product types in associated tables (`Desktop_racunar`, `Komponenta`, `Periferija`).

### 📜 Scripts

- **DDL Script**: SQL script for creating the database schema.

- **DML Script**: Contains sample data for testing purposes.

- **Oracle Data Modeler File**: A `.dmd` file providing a visual data model created using Oracle SQL Developer Data Modeler.

---

## 🧰 Technologies Used

| Technology | Description |

|------------|-------------|

| **Database** | Oracle Database 11g |

| **Backend Language** | Java |

| **Database Connectivity** | JDBC |

| **Tools** | Oracle SQL Developer, Oracle SQL Developer Data Modeler, Eclipse IDE |

---

## 📁 Folder Structure

```

project-root/

│

├── docs/                             # Documentation and model diagrams

│   ├── ER_Model.png

│   ├── Data_Model_Description.docx

│

├── sql/                              # SQL scripts

│   ├── DDL_Script.ddl

│   └── DML_Script.sql                # Rename to .sql for consistency

│

├── Database data modeler/           # Relational model / metadata

│   ├── Data Model Description.docx   # Detailed documentation of the data model and its components 

│   ├── Database relational model/    # Additional metadata for the model

│

├── JDBC/                             # Java application

│   ├── src/                          # Java source code

│   └── bin/                          # Compiled classes

│

└── README.md                         # Project documentation

```

---

## ▶️ How to Run

1. Start Oracle Database and execute the `DDL_Script.ddl` to create the schema.

2. Run `DML_Script.txt` to populate the database with sample data.

3. Configure JDBC connection parameters in the Java project.

4. Compile and run the Java application.

5. *(Optional)* Open `Database relational model.dmd` in Oracle SQL Developer Data Modeler to visualize or modify the schema.

---

## 📊 Sample Outputs (Translated from Serbian for clarity)

> 🔽 The following outputs were originally in Serbian and have been translated into English to improve understanding.

---

### 1️⃣ View Customer Purchase Statistics

```

Customer Purchase Statistics:

NAME                    INVOICE COUNT     TOTAL SPENT

Petar Petrović          1                 85,000.00

Marko Marković          1                 65,000.00

Jovana Jovanović        1                 3,000.00

```

---

### 2️⃣ View Average Product Ratings by Type

```

Average Ratings by Product Type:

PRODUCT TYPE           AVERAGE RATING     NUMBER OF REVIEWS

Desktop Computer       4.75               2

Component              4.75               2

Peripheral             3.00               1

```

---

### 3️⃣ Detailed Purchase Analysis

```

Detailed Purchase Analysis:

NAME                    CART STATUS    QUANTITY    CREATED DATE    REVIEWS    SATISFACTION

Ana Anić                Active         1           2025-01-20       0          0.00

Petar Petrović          Closed         2           2025-01-17       1          5.00

Marko Marković          Closed         2           2025-01-15       1          4.50

Jovana Jovanović        Closed         1           2025-01-10       1          3.00

```

---

### 4️⃣ Product Analysis

```

Product Analysis:

PRODUCT NAME            TYPE             STOCK         ACTIVE CARTS    CLOSED CARTS    POPULARITY

SSD 1TB                 Component        30            0               1               20%

Mechanical Keyboard     Peripheral       75            1               0               20%

Business PC             Desktop          5             0               1               20%

RAM 16GB DDR4           Component        50            0               1               20%

Gaming PC               Desktop          10            0               1               20%

```

---

### 5️⃣ New Purchase with Feedback (Transaction)

```

New Purchase with Feedback:

Enter Customer ID: 1

Enter Product IDs (comma-separated): 1,2

Enter Payment Method: Card

Enter Rating (1-5): 4

Enter Comment: Excellent product

Successfully created purchase with invoice and feedback.

Cart ID: 5

Purchase completed successfully.

```

---

## 📌 Notes

- All outputs are **translated from Serbian** for international users or collaborators.

- The system supports **transactional operations**, such as creating a new purchase with a review, ensuring **ACID compliance**.

## 🗃️ Database Design

The system is based on a **relational database model**, consisting of the following primary entities and their attributes. This structure ensures data consistency, integrity, and supports all core functionalities of the application.

---

### 🏬 Store

Represents a physical or online location where products are sold.

| Attribute         | Description                      |

|------------------|----------------------------------|

| `id_prodavnice`  | Unique identifier of the store   |

| `naziv`          | Store name                       |

| `adresa`         | Store address                    |

---

### 👨‍💼 Employee

Stores employee information and their role within the store.

| Attribute         | Description                          |

|------------------|--------------------------------------|

| `id_zaposlenog`  | Unique identifier of the employee    |

| `ime`            | First name of the employee           |

| `prezime`        | Last name of the employee            |

| `pozicija`       | Job position                         |

| `plata`          | Salary                               |

---

### 🏢 Warehouse

Represents a storage facility for products.

| Attribute           | Description                          |

|--------------------|--------------------------------------|

| `id_magacina`      | Unique identifier of the warehouse   |

| `naziv_magacina`   | Warehouse name                       |

| `kapacitet`        | Maximum storage capacity             |

---

### 📦 Product

Contains information about the products available for sale.

| Attribute         | Description                                             |

|------------------|---------------------------------------------------------|

| `id_artikla`     | Unique identifier of the product                        |

| `naziv_artikla`  | Product name                                            |

| `cena`           | Product price                                           |

| `tip_artikla`    | Product type (`Desktop Computer`, `Component`, `Peripheral`) |

| `kol_na_st`      | Quantity currently in stock                             |

---

### 🛒 Shopping Cart

Tracks products added by customers for potential purchase.

| Attribute          | Description                           |

|-------------------|---------------------------------------|

| `id_korpe`        | Unique identifier of the shopping cart|

| `datum_kreiranja` | Date the cart was created             |

| `status_korpe`    | Cart status (`active`, `empty`, etc.) |

---

### 🧾 Invoice

Stores billing information after a purchase is completed.

| Attribute         | Description                          |

|------------------|--------------------------------------|

| `id_racuna`      | Unique identifier of the invoice     |

| `datum_izdavanja`| Date of invoice creation             |

| `ukupan_iznos`   | Total amount billed                  |

| `nacin_placanja` | Payment method (`cash`, `card`, etc.)|

---

### 👤 Customer

Stores personal information about customers.

| Attribute         | Description                          |

|------------------|--------------------------------------|

| `id_kupca`       | Unique identifier of the customer    |

| `ime_kupca`      | Customer's first name                |

| `prezime_kupca`  | Customer's last name                 |

---

### ⭐ Feedback

Collects product reviews and ratings submitted by customers.

| Attribute         | Description                          |

|------------------|--------------------------------------|

| `id_utiska`      | Unique identifier of the feedback    |

| `ocena`          | Rating value (1–5)                   |

| `komentar`       | Textual comment                      |

| `datum_utiska`   | Date the feedback was submitted      |

---

### 🚚 Supplier

Contains information about product vendors or suppliers.

| Attribute           | Description                          |

|--------------------|--------------------------------------|

| `id_dobavljaca`    | Unique identifier of the supplier    |

| `naziv_dobavljaca` | Supplier name                        |

| `kontakt`          | Contact information                  |

---

### 🛠️ Services

Represents additional services offered by the store (e.g., technical support).

| Attribute         | Description                                   |

|------------------|-----------------------------------------------|

| `id_usluge`      | Unique identifier of the service              |

| `tip_usluge`     | Type of service (`repair`, `installation`, etc.) |

| `cena_usluge`    | Price of the service                          |

| `opis_usluge`    | Description of the service                    |

---

### 📌 Notes

- All tables use appropriate **primary keys** and **foreign keys** to maintain relational integrity.

- Entity relationships are visualized in the `Database relational model.dmd` file included in the project.

- Triggers are used for **data validation** and **business rule enforcement**, particularly for product type integrity.

---