SQL DATE_TRUNC by Quarter
Rounds down to the 1st day of the current quarter — January, April, July, or October 1st.
What & Why
DATE_TRUNC('quarter', date_column) rounds down to whichever of the four quarter-start dates (Jan 1, Apr 1, Jul 1, Oct 1) applies.
See How It Works
BUSINESS QUESTION
Marketing wants quarterly lead totals.
| id | campaign_id | created_at | qualified_at | converted_at | lead_score | source | country | |
|---|---|---|---|---|---|---|---|---|
| 301 | 1 | ana@example.com | 2024-01-21 09:10:00+00 | 2024-01-22 11:00:00+00 | 2024-02-02 10:00:00+00 | 86 | google_ads | US |
| 302 | 1 | ben@example.com | 2024-01-24 12:40:00+00 | NULL | NULL | 52 | google_ads | CA |
| 303 | 2 | chloe@example.com | 2024-02-16 08:30:00+00 | 2024-02-18 14:20:00+00 | NULL | 74 | GB | |
| 304 | 3 | dev@example.com | 2024-03-20 17:15:00+00 | 2024-03-21 09:00:00+00 | 2024-04-04 16:00:00+00 | 91 | US |
EXAMPLE QUERY
SELECT
DATE_TRUNC('quarter', created_at)::date AS lead_quarter,
COUNT(*) AS leads
FROM marketing.leads
GROUP BY lead_quarter
ORDER BY lead_quarter;RESULT — exact output from the displayed Queryflo rows
| lead_quarter | leads |
|---|---|
| 2024-01-01 | 4 |
All displayed leads were created in Q1 2024.
Sign up free to try it on a real business scenario