CREATE TABLE list (lastname CLOB, firstname CLOB, grade NUMBER, classroom NUMBER)
CREATE TABLE teachers (lastname CLOB, firstname CLOB, classroom NUMBER)

Count the number of students the teacher LORIA ONDERSMA teaches.
SELECT COUNT(*) FROM list AS T1 JOIN teachers AS T2 ON T1.classroom = T2.classroom WHERE T2.firstname = "LORIA" AND T2.lastname = "ONDERSMA"
SELECT COUNT(*) FROM "list" "T1" JOIN "teachers" "T2" ON "LORIA" = "T2"."firstname" AND "ONDERSMA" = "T2"."lastname" AND "T1"."classroom" = "T2"."classroom"