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CREATE FUNCTION get_weekends_count(p_from_date date, p_to_date date) RETURNS integer LANGUAGE plpgsql AS $$ DECLARE _count integer := 0; _d date := p_from_date; BEGIN WHILE _d <= p_to_date LOOP IF to_char(_d, 'DY') = 'SAT' OR to_char(_d, 'DY') = 'SUN' THEN _count = _count + 1; END iF; _d = _d + interval '1 day'; END LOOP; RETURN _count; END; $$; select get_weekends_count('2023-04-01'::date, '2023-04-30'::date);

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