From users, return COUNT(*) as total_rows and COUNT(age_bucket) as non_null_ages on one row.

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

Domain

SQL

Difficulty

medium

Problem

From users, return COUNT(*) as total_rows and COUNT(age_bucket) as non_null_ages on one row.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and grades it automatically.