고원석SELECT payment_method, count(*) from orders owhere course_title = ‘앱개발 종합반’Apr 23, 2022Apr 23, 2022
고원석select * from orders owhere email like ‘%naver.com’ and course_title = ‘웹개발 종합반’ and payment_method = ‘kakaopay’Apr 23, 2022Apr 23, 2022