Solution for speeding up a slow SELECT DISTINCT query in Postgres

Question

The query is basically:

SELECT DISTINCT \"my_table\".\"foo\" from \"my_table\" WHERE...

Pretending that I\'m 100% certain the DISTINC

Answer 1

Oftentimes, you can make such queries run faster by working around the distinct by using a group by instead:

select my_table.foo 
from my_table 
where [whatever where conditions you want]
group by foo;