Update README.md

Author: Ramanand23

README.md

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 # College-DBMS-project
-College Database Management System (Mini Project for DBMS subject) 
+# College Database Management System
+
+This project implements a simple College Database Management System using PostgreSQL. It includes SQL scripts for creating tables, inserting data, and performing various queries.
+
+## Project Structure
+
+The project is divided into the following SQL script files:
+
+1. **ddl.sql**: Contains Data Definition Language (DDL) commands for creating tables.
+2. **dml.sql**: Contains Data Manipulation Language (DML) commands for inserting data into the tables.
+3. **queries.sql**: Contains various SQL queries for retrieving and manipulating data.
+
+## Tables
+
+The database consists of the following tables:
+
+- `STUDENT`: Stores details of students.
+- `SEMSEC`: Stores information about semesters and sections.
+- `CLASS`: Stores information about which student is in which class.
+- `SUBJECT`: Stores details about subjects.
+- `IAMARKS`: Stores internal assessment marks of students.
+
+## SQL Scripts
+
+### DDL (Data Definition Language)
+
+The `ddl.sql` file contains SQL commands to create the tables
+
+### DML (Data Manipulation Language)
+
+The `dml.sql` file contains SQL commands to insert/update/delete data into the tables
+
+### DQL (Data Query Language)
+
+The `queries.sql` file contains SQL commands to fetch the data from the tables
+
+How to Run ?
+
+1. Install PostgreSQL: Make sure PostgreSQL is installed on your system.
+2. Create Database: Create a new database in PostgreSQL.
+3. Execute DDL Script: Run the ddl.sql script to create the tables.
+4. Execute DML Script: Run the dml.sql script to insert data into the tables.
+5. Execute Queries: Run the queries.sql script to perform various queries.