CREATE TABLE tryout (cName VARCHAR2)
CREATE TABLE college (cName VARCHAR2)

Find the states where have some college students in tryout.
SELECT DISTINCT state FROM college AS T1 JOIN tryout AS T2 ON T1.cName = T2.cName
SELECT DISTINCT "state" FROM "college" "T1" JOIN "tryout" "T2" ON "T1"."cName" = "T2"."cName"