On Tue, 2024-06-25 at 14:11 -0500, Bruno Wolff III wrote:
> The actual
> use case is a set of tripplets returned from a query, where I want on
> row for each distinct value in the first column, paired with the value
> in the second column, for which the third column is the largest. The
> second and third columns are effectively dependent on each other, so there
> won't be any ambiguity.
Try
SELECT DISTINCT ON (first_column)
first_column,
second_column,
third_column
FROM the_table
ORDER BY first_column, third_column DESC;
Yours,
Laurenz Albe
