Si vous avez plusieurs années, vous devez également tenir compte de l'année. Une façon est :
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;
Une façon plus naturelle d'écrire ceci utilise date_trunc()
:
SELECT date_trunc('week', author_date::date) AS weekly,
COUNT(author_email)
FROM commits
GROUP BY weekly
ORDER BY weekly;