Om du har flera år bör du ta hänsyn till året också. Ett sätt är:
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;
Ett mer naturligt sätt att skriva detta använder date_trunc()
:
SELECT date_trunc('week', author_date::date) AS weekly,
COUNT(author_email)
FROM commits
GROUP BY weekly
ORDER BY weekly;