Database: yelp
Question: Find all users who have written tips for " Barrio Cafe " in 2015
SQL:
SELECT t3.name FROM tip AS t2 JOIN business AS t1 ON t2.business_id  =  t1.business_id JOIN USER AS t3 ON t3.user_id  =  t2.user_id WHERE t1.name  =  "Barrio Cafe" AND t2.year  =  2015;