SQL at work Structuring filters for Ad Hoc analysis

250. Structuring filters for Ad Hoc analysis

Now that you have database access let’s discuss some tips for writing and organizing your research and queries.

This one comes from a Data Analyst colleague of mine. I noticed that the first filter in all of his queries is always 1 = 1 (which is always TRUE and doesn’t affect query results):

SELECT * FROM users WHERE 1 = 1 AND country = 'us' AND status = 'customer' 

The idea is that when you’re researching something you often look at different slices of data by commenting filters out like so:

SELECT * FROM users WHERE 1 = 1 AND country = 'us' --...
“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
Loading chart... ⏳