266. Date and time functions

In this lesson, let’s list all scalar functions from the course that deal with dates and timestamps numbers:

now() / getdate()

The MySQL or PostgreSQL function now() is known as getdate() in Redshift. It returns the current timestamp and could be used to write queries that calculate metrics relative to the present moment:

SELECT SUM(*) AS revenue_last_30_days FROM purchases WHERE refunded = FALSE AND created_at > now() - '30 days'::interval

DATE_PART(text, timestamp/interval)

The DATE_PART() function is used to extract...

“well worth the money”
Sign up and check out 36 free lessons and exercises.

Anatoli Makarevich, author of SQL Habit About SQL Habit

Hi, it’s Anatoli, the author of SQL Habit. 👋

SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst 📊 and solve real-life challenges from Business, Marketing, and Product Management.

SQL Habit course is made of bite-sized lessons (you’re looking at one atm) and exercises. They always have a real-life setting and detailed explanations. You can immediately apply everything you’ve learned at work. 🚀

“well worth the money”

Fluent in SQL in a month

Master Data Analysis with SQL with real life examples from Product Management, Marketing, Finance and more.
-- Type your query here, for example this one -- lists all records from users table: SELECT * FROM users
LIMIT 500
Loading chart... ⏳
Previous lesson: Numeric functions
Next lesson: String functions