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# import sqlite3
# # Create and initialize the database
# def initialize_database():
# conn = sqlite3.connect("college.db")
# cursor = conn.cursor()
# # Create student table
# cursor.execute("""
# CREATE TABLE IF NOT EXISTS student (
# student_id INTEGER PRIMARY KEY,
# first_name TEXT,
# last_name TEXT,
# date_of_birth DATE,
# email TEXT,
# phone_number TEXT,
# major TEXT,
# year_of_enrollment INTEGER
# );
# """)
# # Create employee table
# cursor.execute("""
# CREATE TABLE IF NOT EXISTS employee (
# employee_id INTEGER PRIMARY KEY,
# first_name TEXT,
# last_name TEXT,
# email TEXT,
# department TEXT,
# position TEXT,
# salary REAL,
# date_of_joining DATE
# );
# """)
# # Create course_info table
# cursor.execute("""
# CREATE TABLE IF NOT EXISTS course (
# course_id INTEGER PRIMARY KEY,
# course_name TEXT,
# course_code TEXT,
# instructor_id INTEGER,
# department TEXT,
# credits INTEGER,
# semester TEXT
# );
# """)
# # Insert sample data into student table
# cursor.execute("DELETE FROM student;")
# cursor.executemany("INSERT OR IGNORE INTO student VALUES (?, ?, ?, ?, ?, ?, ?, ?);", [
# (1, "Alice", "Johnson", "2001-06-15", "alice@example.com", "1234567890", "Computer Science", 2019),
# (2, "Bob", "Smith", "2000-04-22", "bob@example.com", "0987654321", "Mechanical Engineering", 2018),
# ])
# # Insert sample data into employee table
# cursor.execute("DELETE FROM employee;")
# cursor.executemany("INSERT OR IGNORE INTO employee VALUES (?, ?, ?, ?, ?, ?, ?, ?);", [
# (1, "Drake", "Miller", "drake@example.com", "CSE", "Professor", 75000.00, "2015-08-01"),
# (2, "Laura", "White", "laura@example.com", "ECE", "Assistant Professor", 65000.00, "2018-07-10"),
# ])
# # Insert sample data into course_info table
# cursor.execute("DELETE FROM course;")
# cursor.executemany("INSERT OR IGNORE INTO course VALUES (?, ?, ?, ?, ?, ?, ?);", [
# (1, "Database Systems", "CS301", 1, "CSE", 4, "Fall"),
# (2, "Digital Electronics", "EC202", 1, "ECE", 3, "Spring"),
# ])
# conn.commit()
# conn.close()
# # Function to execute SQL query and return results
# def run_sql_query(sql_query):
# try:
# conn = sqlite3.connect("college.db")
# cursor = conn.cursor()
# cursor.execute(sql_query)
# rows = cursor.fetchall()
# column_names = [description[0] for description in cursor.description] if cursor.description else []
# conn.commit()
# conn.close()
# if not rows:
# return "No rows returned."
# result = "\t".join(column_names) + "\n"
# for row in rows:
# result += "\t".join(str(cell) for cell in row) + "\n"
# return result.strip()
# except Exception as e:
# return f"Error executing query: {e}"
# # Initialize database when this script runs directly
# if __name__ == "__main__":
# initialize_database()
import sqlite3
# Create and initialize the database
def initialize_database():
with sqlite3.connect("college.db") as conn:
cursor = conn.cursor()
# Enable foreign key support
cursor.execute("PRAGMA foreign_keys = ON;")
# Create student table
cursor.execute("""
CREATE TABLE IF NOT EXISTS student (
student_id INTEGER PRIMARY KEY,
first_name TEXT,
last_name TEXT,
date_of_birth DATE,
email TEXT,
phone_number TEXT,
major TEXT,
year_of_enrollment INTEGER
);
""")
# Create employee table
cursor.execute("""
CREATE TABLE IF NOT EXISTS employee (
employee_id INTEGER PRIMARY KEY,
first_name TEXT,
last_name TEXT,
email TEXT,
department TEXT,
position TEXT,
salary REAL,
date_of_joining DATE
);
""")
# Create course table with foreign key
cursor.execute("""
CREATE TABLE IF NOT EXISTS course (
course_id INTEGER PRIMARY KEY,
course_name TEXT,
course_code TEXT,
instructor_id INTEGER,
department TEXT,
credits INTEGER,
semester TEXT,
FOREIGN KEY (instructor_id) REFERENCES employee(employee_id)
);
""")
# Clear existing data
cursor.execute("DELETE FROM student;")
cursor.execute("DELETE FROM employee;")
cursor.execute("DELETE FROM course;")
# Insert 10 students
students = [
(1, "Alice", "Johnson", "2001-06-15", "alice@example.com", "1234567890", "Computer Science", 2019),
(2, "Bob", "Smith", "2000-04-22", "bob@example.com", "0987654321", "Mechanical Engineering", 2018),
(3, "Charlie", "Brown", "2002-01-12", "charlie@example.com", "1111111111", "Electrical Engineering", 2020),
(4, "Daisy", "Miller", "2001-11-05", "daisy@example.com", "2222222222", "Electronics", 2020),
(5, "Ethan", "Hunt", "1999-09-30", "ethan@example.com", "3333333333", "Mechanical Engineering", 2017),
(6, "Fiona", "Gray", "2003-03-10", "fiona@example.com", "4444444444", "Civil Engineering", 2021),
(7, "George", "King", "2000-08-20", "george@example.com", "5555555555", "Computer Science", 2018),
(8, "Hannah", "Scott", "2001-02-25", "hannah@example.com", "6666666666", "Information Technology", 2019),
(9, "Ian", "Clark", "2002-07-07", "ian@example.com", "7777777777", "Electronics", 2020),
(10, "Julia", "Anderson", "1998-12-18", "julia@example.com", "8888888888", "Civil Engineering", 2016),
]
cursor.executemany("INSERT OR IGNORE INTO student VALUES (?, ?, ?, ?, ?, ?, ?, ?);", students)
# Insert 10 employees
employees = [
(1, "Drake", "Miller", "drake@example.com", "CSE", "Professor", 75000.00, "2015-08-01"),
(2, "Laura", "White", "laura@example.com", "ECE", "Assistant Professor", 65000.00, "2018-07-10"),
(3, "Nina", "Gomes", "nina@example.com", "IT", "Lecturer", 55000.00, "2020-01-15"),
(4, "Oscar", "Fernandez", "oscar@example.com", "ME", "Professor", 80000.00, "2014-03-12"),
(5, "Priya", "Singh", "priya@example.com", "CSE", "Assistant Professor", 62000.00, "2019-06-01"),
(6, "Rahul", "Kumar", "rahul@example.com", "EEE", "Lecturer", 50000.00, "2021-09-20"),
(7, "Sana", "Shaikh", "sana@example.com", "CIV", "Lecturer", 52000.00, "2022-02-11"),
(8, "Tom", "Andrews", "tom@example.com", "ECE", "Associate Professor", 70000.00, "2016-12-09"),
(9, "Uma", "Joshi", "uma@example.com", "IT", "Professor", 78000.00, "2013-05-25"),
(10, "Vikram", "Reddy", "vikram@example.com", "ME", "Assistant Professor", 60000.00, "2017-11-03"),
]
cursor.executemany("INSERT OR IGNORE INTO employee VALUES (?, ?, ?, ?, ?, ?, ?, ?);", employees)
# Insert 10 courses (linked to instructors from employee table)
courses = [
(1, "Database Systems", "CS301", 1, "CSE", 4, "Fall"),
(2, "Digital Electronics", "EC202", 2, "ECE", 3, "Spring"),
(3, "Operating Systems", "CS302", 1, "CSE", 4, "Spring"),
(4, "Thermodynamics", "ME101", 4, "ME", 3, "Fall"),
(5, "Signals and Systems", "EC301", 2, "ECE", 3, "Fall"),
(6, "Data Structures", "CS201", 5, "CSE", 4, "Spring"),
(7, "Electrical Machines", "EE101", 6, "EEE", 4, "Fall"),
(8, "Structural Analysis", "CIV301", 7, "CIV", 3, "Spring"),
(9, "Web Technologies", "IT401", 3, "IT", 3, "Fall"),
(10, "Fluid Mechanics", "ME203", 10, "ME", 4, "Spring"),
]
cursor.executemany("INSERT OR IGNORE INTO course VALUES (?, ?, ?, ?, ?, ?, ?);", courses)
# Function to execute SQL query and return results
def run_sql_query(sql_query):
try:
with sqlite3.connect("college.db") as conn:
cursor = conn.cursor()
cursor.execute("PRAGMA foreign_keys = ON;")
cursor.execute(sql_query)
rows = cursor.fetchall()
column_names = [description[0] for description in cursor.description] if cursor.description else []
if not rows:
return "No rows returned."
result = "\t".join(column_names) + "\n"
for row in rows:
result += "\t".join(str(cell) for cell in row) + "\n"
return result.strip()
except Exception as e:
return f"Error executing query: {e}"
# Initialize database when this script runs directly
if __name__ == "__main__":
initialize_database()
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