Playlist Duration

Playlist · CMU Database Group

CMU Special Topics in Database: Query Optimization (15-799 - Spring 2025)

by CMU Database Group · 14 videos

Total watch time

16h 53m

at 1× speed · exactly 16 hours, 52 minutes, 39 seconds at 1×

At an hour a day you'd finish in 17 days

The shape of the course

Each column is one video, to scale

53:57
1:10:40
1:14:08
1:23:28
1:27:28
1:20:35
1:08:22
1:10:21
59:34
1:11:32
1:14:15
1:14:48
1:11:38
1:11:53

WatchedTo watch

Compare Open on YouTube JSON

Next time, skip the copying: change youtube.com to playlistduration.com in any playlist, video or channel address and it opens here. Or see the total on YouTube itself, with our extension for Chrome, Firefox or Edge.

Your plan

Plan to finish

About 17 days at an hour a day

Pick a daily pace and the days you'll watch. Ticked videos are skipped.

Days

At one hour a day, every day, this playlist takes about 17 days. Turn on JavaScript to plan around your week.

Videos (14)

16h 53m in total · tick what you've watched

Tick videos you've watched — progress is saved in this browser. Titles open on YouTube in a new tab.

Videos to
Watched
1 #01 - SQL Optimization Background (CMU Optimize!) 53:57 2025-01-14
2 #02 - History of Query Optimizers ft. IBM System R (CMU Optimize!) 1:10:40 2025-01-16
3 #03 - IBM Starburst Query Rewriter + Optimizer (CMU Optimize!) 1:14:08 2025-01-23
4 #04 - EXODUS + Volcano Query Optimizer Generators (CMU Optimize!) 1:23:28 2025-01-28
5 #05 - Cascades Query Optimizer (CMU Optimize!) 1:27:28 2025-01-30
6 #06 - Query Plan Transformations (CMU Optimize!) 1:20:35 2025-02-04
7 #07 - Join Ordering: Bottom-up (CMU Optimize!) 1:08:22 2025-02-06
8 #08 - Join Ordering: Top-Down / Transformational (CMU Optimize!) 1:10:21 2025-02-11
9 #09 - Search Parallelization: Bottom-up (CMU Optimize!) 59:34 2025-02-13
10 #10 - Search Parallelization: Top-Down (CMU Optimize!) 1:11:32 2025-02-18
11 #11 - Unnesting Queries (CMU Optimize!) 1:14:15 2025-02-20
12 #12 - Query Cost Models: Statistics (CMU Optimize!) 1:14:48 2025-02-25
13 #13 - Query Cost Models: Cardinality Estimation (CMU Optimize!) 1:11:38 2025-02-27
14 #14 - Query Cost Models: More Cardinality Estimation (CMU Optimize!) 1:11:53 2025-03-14
For your README

Embed a badge

Show the watch time in a README or course description — it links back here and updates itself

Watch time: 16h 53m · 14 videos

Markdown
[![Watch time: 16h 53m · 14 videos](https://playlistduration.com/badge/playlist/PLSE8ODhjZXjYCZfIbmEWH7f6MnYqyPwCE.svg)](https://playlistduration.com/playlist/PLSE8ODhjZXjYCZfIbmEWH7f6MnYqyPwCE)
HTML
<a href="https://playlistduration.com/playlist/PLSE8ODhjZXjYCZfIbmEWH7f6MnYqyPwCE"><img src="https://playlistduration.com/badge/playlist/PLSE8ODhjZXjYCZfIbmEWH7f6MnYqyPwCE.svg" alt="Watch time: 16h 53m · 14 videos" width="210" height="20"></a>

Add ?speed=1.5 to the image URL for the time at that speed, ?label=Course to change the left text, or ?style=flat-square for square corners.

Want the numbers themselves? GET https://playlistduration.com/api/v1/playlist/PLSE8ODhjZXjYCZfIbmEWH7f6MnYqyPwCE returns them as JSON — free, no key. API docs →

Data from the YouTube Data API as of 2026-10-27 (cached). Private or deleted videos are excluded from totals.