Both Arms of the Trial

A easy SQL interview practice problem on DataDriven. Write and execute real sql code with instant feedback.

Domain

SQL

Difficulty

easy

Seniority

L3

Problem

Our experimentation platform logs one record per user assignment, tagged with the feature test and the variant that user landed in. Find the tests that reached both the 'variant_a' and 'variant_b' groups, returning the test name for each.

Summary

Some features were tried both ways.

Practice This Problem

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