CREATE TABLE Students (last_name VARCHAR, student_id VARCHAR)
CREATE TABLE Behavior_Incident (student_id VARCHAR)

Find the id and last name of the student that has the most behavior incidents?
SELECT T1.student_id, T2.last_name FROM Behavior_Incident AS T1 JOIN Students AS T2 ON T1.student_id = T2.student_id GROUP BY T1.student_id ORDER BY COUNT(*) DESC LIMIT 1
SELECT "T1"."student_id", "T2"."last_name" FROM "Behavior_Incident" AS "T1" JOIN "Students" AS "T2" ON "T1"."student_id" = "T2"."student_id" GROUP BY "T1"."student_id" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1