Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/ahmed-naserelden/dbms
A Bash-based DBMS offering menu-driven and SQL-like interfaces for managing databases, tables, and data. Includes features like schema enforcement, primary key support, and flexible query execution.
https://github.com/ahmed-naserelden/dbms
bash-script linux redhat termin
Last synced: 20 days ago
JSON representation
A Bash-based DBMS offering menu-driven and SQL-like interfaces for managing databases, tables, and data. Includes features like schema enforcement, primary key support, and flexible query execution.
- Host: GitHub
- URL: https://github.com/ahmed-naserelden/dbms
- Owner: Ahmed-Naserelden
- Created: 2024-11-25T14:30:39.000Z (27 days ago)
- Default Branch: main
- Last Pushed: 2024-11-30T20:38:54.000Z (22 days ago)
- Last Synced: 2024-11-30T21:26:10.723Z (22 days ago)
- Topics: bash-script, linux, redhat, termin
- Language: Shell
- Homepage:
- Size: 30.3 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Bash Shell Script Database Management System (DBMS)
## **Project Description**
This project is a **Database Management System (DBMS)** implemented in Bash shell scripting. It allows users to create and manipulate databases directly on the file system. The system supports two versions:
1. **Menu-Based Version:**
A command-line interface (CLI) that provides menu-based navigation for database operations.
2. **SQL-Based Version:**
A command-line interface (CLI) that allows users to execute SQL-like queries for database management.
---
## **Features**
### **1. Menu-Based Version**
#### **Main Menu:**
When the user runs the script, the following options are presented:
1. **Create Database:**
Create a new database (stored as a directory).
2. **List Databases:**
Display all existing databases.
3. **Connect to Database:**
Connect to a specific database to manage tables and data.
4. **Drop Database:**
Delete an existing database and all its contents.
5. **SQL Mode**
write sql queries alternative menue
#### **Database Management Menu:**
Once connected to a database, the user can perform the following operations:
1. **Create Table:**
- Specify table name, columns, and their data types.
- Define a **primary key** to enforce uniqueness.
2. **List Tables:**
Display all tables within the connected database.
3. **Drop Table:**
Delete a table and its contents.
4. **Insert into Table:**
- Add new rows to a table.
- Validate data types and ensure the uniqueness of primary keys.
5. **Select From Table:**
- Retrieve and display data from a table.
- Support for selecting all columns or specific columns.
- Filter data using conditions (`=`, `!=`, `<`, `>`, `<=`, `>=`).
- Apply filtering with one condition only (e.g., WHERE column = value).
6. **Delete From Table:**
- Remove rows based on a single condition (e.g., WHERE column = value).
7. **Update Table:**
- Modify existing records by updating column values.
- Support updates based on a single condition (e.g., WHERE column = value) while ensuring primary key integrity and data type validation.
### **2. SQL-Based Version**
- Supports SQL-like commands for database operations. Examples include:
``` bash
isql> use hr;
isql> SELECT employee_id, first_name
FROM employees
WHERE salary >= 5000;
```
## **Technical Details**
- **Database Storage:**
- Databases are implemented as directories.
- Tables are represented as files, with each file storing table rows.
- Metadata files store information about table structure and primary keys.
The system organizes files and directories as follows:
- **File Structure:**
```
├── B2RADB_HOME
│ ├── database1
│ │ ├── table1
| | ├── table2
│ │ └── .metadata
| | ├── table1
│ │ └── table2
│ └── database2
│ ├── .metadata
│ │ └── table1
│ └── table1
├── setup (setup script)
├── run-isql.sh (SQL mode)
└── run.sh (Menu mode)
---
## Installation
Provide step-by-step instructions to set up the project locally.
1. **Clone the Repository**: Begin by cloning the repository to your local machine:
```bash
git clone https://github.com/Ahmed-Naserelden/DBMS.git
```
2. **Navigate to the Project Directory**: Move into the project directory:
```bash
cd DBMS
```
3. **Setup** run `setup` script
```bash
./setup
```
## **How to Run**
### **CLI-Menue-Based Version**
1. Open a terminal.
2. Navigate to the directory containing the `run.sh` script.
3. Run the script using:
```bash
./run.sh
```
---
### **CLI-SQL-Based Version**
1. Open a terminal.
2. Navigate to the directory containing the `run-isql.sh` script.
3. Run the script using:
```bash
./run-isql.sh
```
---
### Future Enhancements
- SQL Features:
Expand support for complex SQL queries, including joins, nested queries, and aggregations.
- Performance Optimization:
Introduce indexing to improve data retrieval speeds.
- Concurrency Control:
Add support for multi-user access with file locking or transactional mechanisms.
- Graphical Interface:
Implement a GUI for users who prefer visual interaction over the command line.
## Contributing
Contributions are welcome! Please fork the repository, make your changes, and submit a pull request.