Flajolet-Martin algorithm
Hi there! Sometimes, we need to know how many UNIQUE rows exist in a table. In a Relational Database World there is a simple but high-costly action for DB engine level (for example DISTINCT or GROUP BY with subquery). The…
Hi there! Sometimes, we need to know how many UNIQUE rows exist in a table. In a Relational Database World there is a simple but high-costly action for DB engine level (for example DISTINCT or GROUP BY with subquery). The…