Cem Yilmaz :
I have a table that has 3 columns. Value, condition and day. I would like to SELECT two columns from column Value. One which is average value of t.value grouped by t.condition 1 and another one which is an average value of t.value grouped by t.condition 2. I would then like to group them all by day and condition.
Result should look like this table.
I have tried case when, if and CTEs. However, they all failed. The if statement work for fulfilling one condition but seeing that condition is binary, the if function i tried did not work. I have considered creating two tables and then joining on day. That would work I would assume. Would there be an easier way of doing this?
Thank you!
Gordon Linoff :
You can use conditional aggregation:
select day,
max(case when condition = 1 then value end) as value_1,
max(case when condition = 2 then value end) as value_2
from t
group by day;
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