This project is a prototype of a lightweight Database Management System (DBMS) implemented in Java. It provides a console-based interface for SQL query execution, features two-factor user authentication, and manages transactions with ACID properties. Data is stored persistently in a custom text format.

• SQL Query Support: Handles CREATE, SELECT, and INSERT SQL commands.
• Two-Factor Authentication: Implements user authentication with ID, password, and a CAPTCHA.
• Transaction Management: ACID-compliant transactions supporting BEGIN TRANSACTION, COMMIT, and ROLLBACK.
• Persistent Storage: Stores data in a custom text format with user-defined delimiters.

• Java Development Kit (JDK) - any version is acceptable
• Standard Java libraries (no third-party libraries used)

1. Clone the Repository

   git clone https://github.com/Keval-Gandevia/CustomSQLDatabase.git

2. Navigate to the Project Directory

   cd CustomSQLDatabase

3. Compile the Code

   javac -d bin src/*.java

4. Compile the Code

   java -cp bin Main

1. Register
   Users must register first with their email, password, and CAPTCHA. Registration data is saved in an authentication file (.txt).

2. Login
   Authenticate with your registered email, password, and CAPTCHA.

3. Execute SQL Queries
   Enter SQL commands to create tables, insert data, and select records.

4. Manage Transactions
   Use BEGIN TRANSACTION, COMMIT, and ROLLBACK commands to handle transactions.