Product Analytics. Part 1 Querying JSON columns

140. Querying JSON columns

Let’s think about what tools do we need to query JSON columns. We know JSON objects are key/value pairs and sometimes value holds a single value (like number or text) or yet another JSON object, which is a key/value pair and… RECURSION 💥 😄


For single values we need a way to extract them. The value of “test_variation” key is a string, we need a way to extract it. It’s done via ->> operator:

SELECT custom_parameters ->> 'test_variation' AS variation, * FROM web_analytics.pageviews WHERE custom_parameters::text != '{}' 

⚠ Note how...

“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... ⏳