Upload 031

Author: ggeerraarrdd

README.md

@@ -71,6 +71,7 @@ ALL CONTENTS IN THIS REPO ARE FOR EDUCATIONAL PURPOSES ONLY.
 | 028   | [Spotify Streaming History](https://datalemur.com/questions/spotify-streaming-history)              | [Solution](solutions/028_spotify_streaming_history.md) | DataLemur | Medium |   |
 | 029   | [Consecutive Filing Years](https://datalemur.com/questions/consecutive-filing-years)                | [Solution](solutions/029_consecutive_filing_years.md) | DataLemur | Hard |   |
 | 030   | [Average Post Hiatus (Part 1)](https://datalemur.com/questions/sql-average-post-hiatus-1)           | [Solution](solutions/030_average_post_hiatus_part_1.md) | DataLemur | Easy |   |
+| 031   | [Mean, Median, Mode](https://datalemur.com/questions/mean-median-mode)                              | [Solution](solutions/031_mean_median_mode.md) | DataLemur | Medium | `PERCENTILE_CONT()`  |
 
 ## Authors
 

solutions/031_mean_median_mode.md

@@ -0,0 +1,56 @@
+# SQL Everyday \#031
+
+## Mean, Median, Mode
+
+Site: DataLemur\
+Difficulty per Site: Medium
+
+## Problem
+
+You're given a list of numbers representing the number of emails in the inbox of Microsoft Outlook users. Before the Product Management team can start developing features related to bulk-deleting email or achieving inbox zero, they simply want to find the mean, median, and mode for the emails.
+
+Display the output of mean, median and mode (in this order), with the mean rounded to the nearest integer. It should be assumed that there are no ties for the mode. [[Full Description](https://datalemur.com/questions/mean-median-mode)]
+
+## Submitted Solution
+
+```sql
+-- Submitted Solution
+WITH mean AS (
+SELECT
+  ROUND(AVG(email_count)) AS mean
+FROM inbox_stats
+),
+median AS (
+SELECT
+  PERCENTILE_CONT(0.5) WITHIN GROUP (ORDER BY email_count) AS median
+FROM inbox_stats
+),
+mode AS (
+SELECT
+  MODE() WITHIN GROUP (ORDER BY email_count) AS mode
+FROM inbox_stats
+)
+SELECT
+  (SELECT mean FROM mean) AS mean
+  ,(SELECT median FROM median) AS median
+  ,(SELECT mode FROM mode) AS mode
+;
+```
+
+## Site Solution
+
+```sql
+-- DataLemur Solution 
+SELECT 
+  ROUND(AVG(email_count)) as mean,
+  PERCENTILE_CONT(0.5) WITHIN GROUP (ORDER BY email_count) AS median,
+  MODE() WITHIN GROUP (ORDER BY email_count) AS mode
+  FROM inbox_stats;
+```
+
+## Notes
+
+TODO
+
+Go to [Table of Contents](/README.md#contents)\
+Go to [Overview](/README.md)