[munk-a]

I wanted to briefly reinforce this point with the fact that SQL has multiple equality operators - there is both `=` and `IS NOT DISTINCT FROM`. The later operator will treat null values as equal in alignment with the `DISTINCT` and `DISTINCT ON` operators.

It is extremely easy using partial uniques and the proper operators to treat nulls as non-distinct values and the approach we have allows some very important functionality that aligns with standard statistical data treatment which was influential to how SQL logic was originally designed.