Tutor notes and solutions for Tutorial 2 are now on the tutorial page, together with next week’s exercises. Tutorial 3 is about formulating queries in tuple relational calculus and finding ways to compute them in relational algebra.

Have a look at the exercises now, and if you have questions about anything then ask on *Piazza* or after lectures.

where is homework?

Homework from Friday’s lecture is on the blog:

https://blog.inf.ed.ac.uk/da17/archives/284#homework

Tutorial exercises for this week are on the tutorials page:

https://blog.inf.ed.ac.uk/da17/tutorials#exercises