def execute_some_queries(conn)
execute_sql_non_query(conn, "DELETE FROM customers")
execute_sql_non_query(conn, "INSERT INTO customers (ref, name, surname, phone) " \
"VALUES (1, 'Linus', 'Torvalds', '264-85529-23');" \
"INSERT INTO customers (ref, name, surname, phone) " \
"VALUES (2, 'Alan', 'Cox', '05-564791235416');")
execute_sql_non_query(conn, "DELETE FROM accounts;" \
"INSERT INTO accounts (ref_customer, balance) " \
"VALUES (1, 1000);" \
"INSERT INTO accounts (ref_customer, balance) " \
"VALUES (2, 5000);")
execute_sql_command(conn, "SELECT * FROM customers;" \
"SELECT * FROM accounts")
end