Group by date every 10 days - mysql

Question

I have this scheme:
+----+--+--------+--------------------+
| ID | Amount | paydate |
+----+-----------+--------------------+
| 1 | 200 |2016-11-05 |
+----+-----------+--------------------+
| 2 | 3000 |2016-11-10 |
+----+-----------+--------------------+
| 3 | 2500 |2016-11-11 |
+----+-----------+--------------------+
| ID | 100 |2016-11-21 |
+----+-----------+--------------------+
| 1 | 200 |2016-11-22 |
+----+-----------+--------------------+
| 2 | 3000 |2016-11-23 |
+----+-----------+--------------------+
| 3 | 2500 |2016-11-29 |
+----+-----------+--------------------+
How can I get the total Amount grouped by every 10 days like from the first of every month to the 10th then from 11th to 20th and from 21st to the end of the month?
to be shown like this :
+-----------+------------------------+
| Amount | paydate |
+-----------+------------------------+
| 3200 |2016-11-1 to 2016-11-10 |
+-----------+------------------------+
| 2500 |2016-11-11 to 2016-11-20|
+-----------+------------------------+
| 5800 |2016-11-21 to 2016-11-31|
+-----------+------------------------+
I tried
SELECT
SUM(Amount) AS Amount,
year(Facture.paydate) AS Annee,
month(Facture.paydate) AS Mois
FROM Facture
GROUP BY year(Facture.paydate), month(serFacture.paydate)
but this does not give me the result I need.

Answer 1

select sum(Amount) as sum_amount
,case
when day(paydate) <= 10 then concat(DATE_FORMAT(paydate,'%Y-%m-01'),' to ',DATE_FORMAT(paydate,'%Y-%m-10'))
when day(paydate) <= 20 then concat(DATE_FORMAT(paydate,'%Y-%m-11'),' to ',DATE_FORMAT(paydate,'%Y-%m-20'))
else concat(DATE_FORMAT(paydate,'%Y-%m-21'),' to ',DATE_FORMAT(paydate,'%Y-%m-31'))
end as paydate_period
from t
group by paydate_period
;
sum_amount paydate_period
3200 2016-11-01 to 2016-11-10
2500 2016-11-11 to 2016-11-20
5800 2016-11-21 to 2016-11-31

Answer 2

Here is an example query:
select
case
when day(date_field) between 1 and 10 then "01 to 10"
when day(date_field) between 11 and 20 then "11 to 20"
when day(date_field) between 21 and 31 then "21 to 31"
end as the_range,
date_format(date_field, "%m%Y") as the_month,
count(*)
from
the_table
group by
the_range, the_month
order by
the_month, the_range;
You can adapt the query so you display your result the way you need.