Ако имате няколко години, трябва да вземете предвид и годината. Един от начините е:
SELECT date_part('year', author_date::date) as year,
date_part('week', author_date::date) AS weekly,
COUNT(author_email)
FROM commits
GROUP BY year, weekly
ORDER BY year, weekly;
По-естествен начин да напишете това използва date_trunc()
:
SELECT date_trunc('week', author_date::date) AS weekly,
COUNT(author_email)
FROM commits
GROUP BY weekly
ORDER BY weekly;