https://www.fastcompany.com/3059634/your-brain-has-a-delete-button-heres-how-to-use-it
Thinking with a sleep-deprived brain is like hacking your way through a dense jungle with a machete. Its overgrown, slow going, exhausting.
The new FILTER clause in Aggregations
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Oracle 26.1 introduces the new FILTER clause that can be used in
aggregations.
Thus, for example, *in a SUM aggregation you can use FILTER WHERE ...*
...
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