A junior data engineer is testing a code block designed to fetch the most recent entry for each item in the 'sales' table since the last update. The code utilizes a window function partitioned by 'item_id' and ordered by 'item_time' in descending order. However, the execution fails. What is the primary reason for this failure?

Real Exam

Explanation:

Attempting to perform non-time-based window operations on streaming DataFrames results in an error, as these operations are not supported. The correct approach is to implement such window operations within a foreachBatch logic to circumvent this limitation.

Powered ByGPT-5

Databricks Certified Data Engineer - Professional

Get started today

Databricks Certified Data Engineer - Professional

Get started today