CREATE TABLE tryout (cName VARCHAR, decision VARCHAR)
CREATE TABLE college (state VARCHAR, cName VARCHAR)

Find the states where have some college students in tryout and their decisions are yes.
SELECT DISTINCT T1.state FROM college AS T1 JOIN tryout AS T2 ON T1.cName = T2.cName WHERE T2.decision = 'yes'
SELECT DISTINCT "T1"."state" FROM "college" AS "T1" JOIN "tryout" AS "T2" ON "T1"."cName" = "T2"."cName" AND "T2"."decision" = 'yes'