使用雪花 sql 将多行平展为 1 行

Question

i have a table like this:

id  col1 col2 col3 col4
1   Y    N    N    N  
1   N    N    Y    N
1   N    Y    N    N
1   N    N    N    N

i want it to look like this:

id col1 col2 col3 col4
1  Y    Y    Y    N

how can i do this

Answer 1

You can use MAX() :

select id, max(col1), max(col2), max(col3), max(col4)
from t
group by id;

Answer 2

If the value to want is not naturally high (and thus you can use MAX) or not naturally low (and thus use MIN) then you can and you are looking for a single state you can encode that into

IFF(SUM(IFF(value = <target>,1,0)>0,<target>,<non-target>)

which really should be done via BOOLOR_AGG (which has the exact example you have posted).

select id, boolor_agg(col1), boolor_agg(col2), boolor_agg(col3), maxboolor_agg(col4)
from t
group by id;

Otherwise if you really how some more complex value aggregation beyond the assumed logical or it appears you want, you will need to explain more.