select unit, sum(1 << bit_position) from table1 where val group by unit;
To make it more complex.. Is it possible to select into "different
bytes" depending on bit_position? (For example that bit_position 0-7
represent byte 1, bit_position 8-15 represent another)
To get a second "byte" I can tweak your initial idea to:
select unit, sum(1 << (bit_position-9)) from table1 where val and
bit_position between 8 and 15 group by unit;
But that would need to get merged into the initial solution some way on
the same select row result.
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