Distribution Orders for Users - sql

Question

I have orders and users. I distribute evenly for each user's orders.
I need to redistribute when new users are added. And it is necessary to take into account the difference between the fulfilled and the limit in the algorithm. If users have made a limit on the first distribution, they do not include in the new distribution and expose the column to the limit value from the column made.
declare #orderCount int
set #orderCount = 50 --Orders for Distribution
--Result table
declare #t table (
users char(3),
limit int,
Made int
)
--Add users
insert into #t (users, limit, Made) values
('us1',0,0),
('us2',0,0),
('us3',0,0)
--Table for the Distribution algorithm
declare #c table (
users char(3),
limit int,
Made int,
Cnt int,
Rn int
)
--Count users and row_number
insert into #c
select
*,
COUNT(*) OVER () as Cnt,
ROW_NUMBER() OVER (ORDER BY users) as Rn
from
#t
--var for check new distribution>made
DECLARE #check int = 0
--Distribution
update t
set #check = (#orderCount/Cnt) + CASE WHEN #orderCount % Cnt >= Rn THEN 1 ELSE 0 END,
limit=
CASE WHEN
(#check >= t.Made)
THEN
#check
ELSE
t.Made
END
FROM #t t
INNER JOIN #c cn ON cn.users=t.users
--Test data
UPDATE #t SET Made=12 WHERE users='us1'
UPDATE #t SET Made=10 WHERE users='us2'
UPDATE #t SET Made=5 WHERE users='us3'
--Check result
SELECT * FROM #t
--add to distribution new users
INSERT INTO #t (users, limit, Made) values ('us4',0,0)
INSERT INTO #t (users, limit, Made) values ('us5',0,0)
--Clear table
DELETE FROM #c
--Check new data
insert into #c
select
*,
COUNT(*) OVER () as Cnt,
ROW_NUMBER() OVER (ORDER BY users) as Rn
from
#t
--Distribution
update t
set #check = (#orderCount/Cnt) + CASE WHEN #orderCount % Cnt >= Rn THEN 1 ELSE 0 END,
limit=
CASE WHEN
(#check >= t.Made)
THEN
#check
ELSE
t.Made
END
FROM #t t
INNER JOIN #c cn ON cn.users=t.users
--Check result
SELECT * FROM #t
It divides the number of orders for users. 50/3 ~16 orders for 1 users. If I add 2 new users then 50/5 ~ 10. But 1 users do 12 orders. 12 more new distribution orders (10). then him past into column limit 12. And 50-12=38. Then 38/4 ~ 9 orders the rest uesrs.

Answer 1

SELECT x.users,
x.work,
x.Made,
sum(CASE WHEN Made>NewLimit THEN Made ELSE 0 END) OVER() as Dif,
count(CASE WHEN Made<NewLimit THEN NewLimit END) OVER() as Cnt,
CASE WHEN Made>NewLimit THEN 0 ELSE 1 END as IsUsed,
(CASE WHEN Made<NewLimit THEN
ROW_NUMBER() OVER (PARTITION BY x.work, (case when Made<NewLimit then 1 else 0 end) ORDER BY work) ELSE 0 END) as Rn
FROM (
SELECT t.users ,(#orderCount/Cnt) + CASE WHEN #orderCount % Cnt >= Rn THEN 1 ELSE 0 END as NewLimit,
t.Made,
t.work
FROM #t t
INNER JOIN #c cn ON cn.users=t.users
) x
I consider the amount where the old distribution is more. I'm setting the isUsed flag for the new distribution. I consider the number. I deduct from all orders the amount where the new lehmite is accustomed and divide the amount received for a quantity that is suitable for a new distribution.