CREATE TABLE Subjects (subject_name VARCHAR, subject_id VARCHAR)
CREATE TABLE Courses (subject_id VARCHAR)

Find the subject ID, subject name, and the corresponding number of available courses for each subject.
SELECT T1.subject_id, T2.subject_name, COUNT(*) FROM Courses AS T1 JOIN Subjects AS T2 ON T1.subject_id = T2.subject_id GROUP BY T1.subject_id
SELECT "T1"."subject_id", "T2"."subject_name", COUNT(*) FROM "Courses" AS "T1" JOIN "Subjects" AS "T2" ON "T1"."subject_id" = "T2"."subject_id" GROUP BY "T1"."subject_id"