Attendees By Track

Problem

Table: `attendee`

| Column Name | Type |
|---|---|
| attendee_name | varchar |
| track | varchar |

Each row records a conference attendee and the track they registered for. The `track` is always one of three values: `Design`, `Backend`, `Mobile`.

Pivot the data into three columns named `Design`, `Backend`, and `Mobile`. Within each column the attendee names must be listed in alphabetical order from top to bottom. Because tracks can have different numbers of attendees, shorter columns are padded with `NULL`.

Tables

Example rows — the live problem includes the full dataset.

Expected output

Your answer should return 2 rows with the columns Design, Backend, Mobile.

Starter code (SQL)

SELECT *
FROM attendee;

Related SQL questions

• 3-Consecutive-Week Marketing StreakHard
• 30-Day Rolling Average Trading VolumeHard
• 7-Day Active User Rolling MetricHard
• 7-Day Revenue Moving AverageHard
• Always Mid-Pack BakersHard
• Annual Energy Output Growth by Panel ModelHard