#Querying the database
def query_database(tabletweets):
    engine = create_engine("postgresql+psycopg2://%s:%s@%s:%d/%s" %(usertwitter, passwordtwitter, hosttwitter, porttwitter, dbnametwitter))
    table = pd.read_sql_query('select * from %s' %tabletweets,con=engine, index_col='id')
    return table