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SELECT item, purchases, category, LAST_VALUE(item)
OVER (item_window) AS most_popular
FROM Produce
WINDOW item_window AS (
PARTITION BY category
ORDER BY purchases
ROWS BETWEEN 2 PRECEDING AND 2 FOLLOWING);
SELECT item, purchases, category, LAST_VALUE(item)
OVER (d) AS most_popular
FROM Produce
WINDOW
a AS (PARTITION BY category),
b AS (a ORDER BY purchases),
c AS (b ROWS BETWEEN 2 PRECEDING AND 2 FOLLOWING),
d AS (c);
SELECT item, purchases, category, LAST_VALUE(item)
OVER (c ROWS BETWEEN 2 PRECEDING AND 2 FOLLOWING) AS most_popular
FROM Produce
WINDOW
a AS (PARTITION BY category),
b AS (a ORDER BY purchases),
c AS b;
select
*
, max(x) over (window_z) as max_x_over_z
from raw_data_1
window window_z as (partition by z)
union all
select
*
, max(x) over (window_z) as max_x_over_z
from raw_data_2
window window_z as (partition by z);
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