Los 50 mejores publicadores
Devuelve los 50 mejores publicadores para un período mensual determinado. Los resultados se ordenan por post_count. Acepta un parámetro ‘months_ago’, con un valor predeterminado de 0 para obtener resultados del mes actual.
-- [parámetros]
-- int :months_ago = 1
WITH query_period AS (
SELECT
date_trunc('month', CURRENT_DATE) - INTERVAL ':months_ago months' as period_start,
date_trunc('month', CURRENT_DATE) - INTERVAL ':months_ago months' + INTERVAL '1 month' - INTERVAL '1 second' as period_end
),
user_posts_in_period AS (
SELECT
p.user_id
FROM posts p
INNER JOIN query_period qp
ON p.created_at >= qp.period_start
AND p.created_at <= qp.period_end
WHERE p.user_id > 0
)
SELECT
up.user_id,
count(1) as post_count
FROM user_posts_in_period up
GROUP BY up.user_id
ORDER BY post_count DESC
LIMIT 50