sql-cookbook

Platform-Specific Syntax Guide

PostgreSQL (Aurora, RDS, Supabase, Neon)

Working with dates and times:

-- Today and now
CURRENT_DATE, CURRENT_TIMESTAMP, NOW()

-- Adding and subtracting intervals
some_date + INTERVAL '7 days'
some_date - INTERVAL '1 month'

-- Round down to a time boundary
DATE_TRUNC('month', event_ts)

-- Pull out individual components
EXTRACT(YEAR FROM event_ts)
EXTRACT(DOW FROM event_ts)  -- Sunday = 0