Неверное значение суммы, отображаемое, когда 2 или более таблиц

Question

У меня есть этот запрос

SELECT distinct
date(b.updated_at) as date, 
sum(case when c.cash_details = "CASH IN" and is_approved = 1 then cash_user end) AS totalcashin, 
sum(case when c.cash_details = "CASH OUT" and is_approved = 1 then cash_user end) AS totalcashout,
sum(ticket_num * 1000) AS 'betting amount',
sum(case when bet_details = "WIN" then winning_num end) AS 'winning amount'
FROM cash_details as c, bet_details as b  
-- where date(b.updated_at) = '2019-08-22'
group by date(b.created_at)
order by date(b.created_at) desc
;

, и результат равен queryfirstpic

, но для этого запроса

select  
date(created_at), 
sum(ticket_num * 1000) AS 'betting amount' ,
sum(case when bet_details = "WIN" then winning_num end) AS 'winning amount'
from bet_details
-- where date(updated_at) = '2019-08-22'
group by date(created_at)
order by date(created_at) desc
;

результат равен queryoutput2nd

, а другой запрос -

SELECT date(created_at),
sum(case when c.cash_details = "CASH IN" and is_approved = 1 then cash_user end) AS totalcashin, 
sum(case when c.cash_details = "CASH OUT" and is_approved = 1 then cash_user end) AS totalcashout
from cash_details as c
group by date(c.created_at)
order by date(c.created_at) desc
;

: 3-й запрос

Когда я пытался выполнить запрос к таблицам вотображать каждую сумму, запрос с 2 таблицами показывает различные значения суммы.