This must be "The Daily WTF of the Year":
From "the global leader in providing supply chain execution and optimization solutions": One View to Rule Them All. See the underlying SQL-Code.
One of the most absurd things I have ever seen: Subselects, which contain subselects, which contain subselects, which contain aggregation functions. Also, the DISTINCT clause is certainly beneficial in regard to performance - especially on a view that might return every potential row, with close to 400 columns!
The unfortunate maintenance programmer explains:
"I was further astounded to learn that timeouts on certain critical operations were *routine*! [...] Paging through the trace, I found a stored procedure which took 505306 milliseconds - that's 8.5 minutes (!!!) - to execute, at 45% server utilisation."