Output "none" - psycopg2 database query - sql

Question

0
I'm new to SQL and currently try to resolve a data table problem.
I have a data table and now need to find firstly the dates, on which a request lead to an error. They are pulled as timestamps from the log database. Afterwards the status is checked where not status = '200 OK' and the days on which more than 1% of requests lead to an error are shown having count(*) > 0.01,order by num desc.
Now I have the problem, that I don't get any output shown:
OUTPUT IN THE TERMINAL:
--
Following the dates for >1 percent requests, leading to an error:
None
None
CODE:
def number_one_error():
"""
Percentage of errors from requests
Counting errors and timestamps
Output:
number one errors
"""
db = psycopg2.connect(database=dbname)
c = db.cursor()
c.execute('''
select oneerror.date_column, round(((cast(oneerror.request_error as decimal))/requests*1.0),2) as percent
from (select date(log.time) AS date_column,
count (*) as request_error
from log where not status = '200 OK'
group by date_column) as oneerror
join (select date(log.time) AS date_column,
count(*) as requests
from log
group by date_column) as total
on oneerror.date_column = total.date_column
where round((cast(oneerror.request_error as decimal)/requests*1.0),3)> 0.01
order by percent desc
''')
number_one_error = c.fetchall()
db.close()
THANK YOU SO MUCH!