Table shift field values to columns - sql

Question

My main problem is that I'm not sure what I'm trying to do, so I don't know how to research it. If anyone could give me some terminology or direction or answer I would greatly appreciate it.
I know what my end goal is, I just don't know what the proper terms are.
I have a query that returns this:
select *
from details
where EventId in (1,2,3)
╔═════════╦═════════╦═════╦═══════════════════════╦══════╗
║ EventId ║ Name ║ Col ║ StrValue ║ Col6 ║
╠═════════╬═════════╬═════╬═══════════════════════╬══════╣
║ 1 ║ Person ║ 0 ║ Alice.Anderson ║ NULL ║
║ 1 ║ Machine ║ 0 ║ SPOT-001 ║ NULL ║
║ 1 ║ Address ║ 1 ║ 10.0.0.14 ║ NULL ║
║ 1 ║ Pool ║ 0 ║ GT2 ║ NULL ║
║ 2 ║ Person ║ 0 ║ Bob.Barker ║ NULL ║
║ 2 ║ Machine ║ 0 ║ SPOT-006 ║ NULL ║
║ 2 ║ Address ║ 1 ║ 10.0.0.19 ║ NULL ║
║ 2 ║ Pool ║ 0 ║ GT2 ║ NULL ║
║ 3 ║ Person ║ 0 ║ Christine.Christensen ║ NULL ║
║ 3 ║ Machine ║ 0 ║ SPOT-003 ║ NULL ║
║ 3 ║ Address ║ 1 ║ 10.0.0.34 ║ NULL ║
║ 3 ║ Pool ║ 0 ║ GO1 ║ NULL ║
╚═════════╩═════════╩═════╩═══════════════════════╩══════╝
I would like a query that returns this, where column 2 and 3 names are based on the fields from the previous table:
╔═════════╦══════════╦═══════════════════════╗
║ EventId ║ Machine ║ Person ║
╠═════════╬══════════╬═══════════════════════╣
║ 1 ║ SPOT-001 ║ Alice.Anderson ║
║ 2 ║ SPOT-006 ║ Bob.Barker ║
║ 3 ║ SPOT-003 ║ Christine.Christensen ║
╚═════════╩══════════╩═══════════════════════╝
I've been able to get close with a collection of case when statements, but there's always so many nulls and it doesn't collapse like I need it to.
I have tried something like this, and gotten the following:
select
case when Name in ('Person','Machine') then EventId end,
case Name when 'Machine' then StrValue end,
case Name when 'Person' then StrValue end
from details
where EventId = 1
╔═════════╦══════════╦════════════════╗
║ EventId ║ Machine ║ Person ║
╠═════════╬══════════╬════════════════╣
║ NULL ║ NULL ║ NULL ║
║ 1 ║ Spot-001 ║ NULL ║
║ 1 ║ NULL ║ Alice.Anderson ║
║ NULL ║ NULL ║ NULL ║
║ NULL ║ NULL ║ NULL ║
║ NULL ║ NULL ║ NULL ║
║ NULL ║ NULL ║ NULL ║
╚═════════╩══════════╩════════════════╝
But I don't know how to collapse those two rows and ignore all the nulls, or if there's a more efficient way to do this on large tables.

Answer 1

I'm pretty sure this would give you the output you're expecting:
select
EventId,
max(case Name when 'Machine' then StrValue end) as machine,
max(case Name when 'Person' then StrValue end) as person
from details
where EventId = 1
and name in ('Person','Machine')
group by EventId