데이터베이스 오류가 발생하였습니다

Error Number: 1054

Unknown column 'A.lecturer_id' in 'where clause'

SELECT A.*, B.post_title FROM cb_lecture as A, cb_post as B WHERE B.brd_id=22 AND A.lecturer_id=B.post_id AND A.edu_id=1 ORDER BY A.sort ASC, A.ID DESC

Filename: controllers/D001.php

Line Number: 57