import mysql.connector
from mysql.connector import Error

def connect_database(host, username, password, database):
    connection = None
    try:
        connection = mysql.connector.connect(
            host=host,
            user=username,
            passwd=password,
            database=database
        )
        print("SQL connection established")
    except Error as err:
        print(f'Error: {err}')

    return connection

def send_query(connection, query, parameters):
    cursor = connection.cursor()
    try:
        cursor.execute(query, parameters)
        connection.commit()
        return True
    except Error as err:
        print(f'Error: {err}')
        return False

def read_query(connection, query):
    cursor = connection.cursor()
    result = None
    try:
        cursor.execute(query)
        result = cursor.fetchall()
        connection.commit()
        return result
    except Error as err:
        print(f'Error: {err}')