# C4M4\_Assignment - Graded Exercise 3

**URL:** <https://community.deeplearning.ai/t/c4m4-assignment-graded-exercise-3/894504>\
**Category:** Data I/O and Processing with Python and SQL\
**Tags:** week-module-4, coursera-platform\
**Created:** [August 10, 2026, 3:51pm UTC](https://community.deeplearning.ai/t/c4m4-assignment-graded-exercise-3/894504 "2026-08-10T15:51:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Peter\_Donovan](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/peter_donovan/32/151428_2.png) [@Peter\_Donovan](https://community.deeplearning.ai/u/Peter_Donovan)\
**Post date:** [August 10, 2026, 3:51pm UTC](https://community.deeplearning.ai/t/c4m4-assignment-graded-exercise-3/894504/1 "2026-08-10T15:51:49Z")

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Directions state:

 ![image](https://global.discourse-cdn.com/dlai/original/3X/6/c/6c12ffdaa9164c7d037c7af33da86708c8f9da62.png)

However, the expected output includes records that have a NULL rating as well. Written according to the directions the output is:

 ![image](https://global.discourse-cdn.com/dlai/original/3X/e/b/ebcb9b86c188a601e6c20c5d66eb8107b9969f8e.png)

This could be clarified or corrected in future.

Thank you.

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<div class="post-metadata">

**Author:** ![lukmanaj](https://sea1.discourse-cdn.com/dlai/user_avatar/community.deeplearning.ai/lukmanaj/32/161609_2.png) [@lukmanaj](https://community.deeplearning.ai/u/lukmanaj)\
**Post date:** [August 10, 2026, 5:40pm UTC](https://community.deeplearning.ai/t/c4m4-assignment-graded-exercise-3/894504/2 "2026-08-10T17:40:42Z")

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Hi, welcome to the community. Thanks for flagging this. Just ran the query from my end. Will raise this with the course maintainers.