1. Beers which are not served by Gecko Grill bar
2. Drinkers who like all beers which Justin likes
3. Pairs of drinkers and bars such that a drinker frequents the bar and the bar serves no beer which the drinker likes
4. Bars which are frequented by neither Justin nor Rebecca
5. Drinkers who frequent only these bars which sell beers that they like
6. Bars which serve no beer cheaper than $5
7. What is the bar with the highest average price of beer that it sells
8. Order all bars by the average price of beer that they sell (in descending order)
9. Find all bars whose names consist of more than one word
10. Which drinker(s) like the most beers
11. Which beer has the highest average price over all bars
12. Find bar(s) which charge the smallest price for Budweiser (Bud)
13. Using outer join (left/right - your choice) Find drinkers who do not frequent
any bar which sells Budweiser
14. Using outerjoin find a beer which is not sold by any bar which Mike frequents
15. Write a query which returns "Yes" if there is any beer which all drinkers like, and "No" otherwise.
16. Write a query like the one above which either returns such a beer, or if there is no such beer, returns "No such a beer exists".
