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[英]SQL pivoting - How to get all possible combinations between multiple columns to be pivoted
[英]SQL pivot - How to get all possible combinations between columns to be pivoted
這是我的源表(pivot_dummy):
並且我需要按Parameter_type進行旋轉,但需要Parameter_val之間的所有可能組合。 像這樣
我正在使用此代碼來完成它:
SELECT nct_id, [Asset],[Indication], rowid
FROM (SELECT nct_id,Parameter_val,parameter_type, rowid
FROM (Select *,
Row_Number() Over (Partition By nct_id,Parameter_type ORDER BY nct_id) RowId
from [dbo].[pivot_dummy]
) a
) s
Pivot (
max(parameter_val)
for Parameter_type in ([Asset], [Indication])
) as pivottable
但是此代碼導致以下結果:
有人可以幫忙嗎?
據我所知,您根本不需要pivot
。 只需join
:
select pd1.nct_id, pd1.parameter_value as asset, pd2.parameter_value as indication
from pivot_dummy pd1 join
pivot_dummy pd2
on pd1.nct_id = pd2.nct_id and
pd1.parameter_type = 'Asset' and
pd2.parameter_type = 'Indication';
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