gill-sama

for row in cursor.execute(...):
   cash, = row
   # или
   cash = row[0]

res = cursor.execute(...)
res_list = res.fetchall()
cash = res_list[0][0]

select status, generate_series(
    date_trunc('hour', date_start),
    date_trunc('hour', date_end),
    interval '1 hour')
  from tab

select
  distinct(registration_date),
  count(*) over (order by registration_date) as registered
from users
order by registration_date;