CMU Database Systems - 02 Relational Algebra (Fall 2017)

[@dragonfly3139]

Thank you Professor Andy for the wonderful lecture, I have been watching most of the lectures on your channel I hear you all the time talk about you and your students getting involved with police and law enforcement. I don't understand why these nut jobs are targeting you. I hope you are safe. take care

[@supergogetaSS4return]

That's what you get when you're involved in databases. It's a risky endeavour.

[@jdfesa]

35:20 In relational algebra, the UNION operator removes duplicate rows, so the row a3, 103 would appear only once in the result, just like in SQL. If you wanted to retain duplicate rows, you could use the UNION ALL operation, if it were available in your relational algebra system.

[@BULLSHXTYT]

Take care Professor. You are great.

[@danyeun01]

as a non-cmu student, the first minute of talking about getting arrested by the police caught me so off guard lol

[@mesarvagya777]

You know a professor is cool if he knows Wu-Tang Clan and Biggie.

[@nyx4853]

Excellent presentation!

[@kenken7630]

Thank you explained it really well.

[@imflash217]

Is there any way for non-CMU students to verify their solutions of the assignemts? Will there be any Homework Recitation sessions that will be uploaded (obviously after a particular HW is due)?

[@sensationQQQ]

also need auto grading script here!

[@sensationQQQ]

just like the 15-213 course ,hope professor can supply selfstuday hand-out..Thx!

[@wenchaohu3944]

There are solutions on the website, you can check them yourself. 15445.courses.cs.cmu.edu/fall2017/assignments.html

[@sensationQQQ]

thx.I found it.

[@wnw8079]

Wow, Amazing lecture finally deliver ;)

[@nur-a-alamabir8922]

Please re upload the lecture note

[@felipegutierrez7856]

thanks. very very helpful

[@Krisztyan]

Where can I find the lecture notes? Super lecture again!

[@architpandey9049]

15445.courses.cs.cmu.edu/fall2017/schedule.html

[@Krisztyan]

Archit Pandey thx

[@isabelmayo8843]

Fantastic!! Thanks so much!!

[@YasuoMidOnly]

Nice