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Предположение, что используется всегда LVM, а при нехватке докидываются диски и подцепляются, верное?
Смотрю и вижу, что у LVM тоже есть всякие writethrough/writeback...
Size: a a a
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User_id | Wins | Loses | WinrateMatch_id | User_id | match_type | result
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insert into stats
select
*,
win_count / (win_count + loose_count) as winrate
from (
select
user_id,
count(*) filter(where result = 'lose') as loose_count,
count(*) filter(where result = 'win') as win_count,
from matches
group by user_id
)
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with x as (
select ...
), y as (
select ...
)
select from x
union
select from y
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