쿼리문좀 도와주세요
본문
SELECT
A.album_name,
A.reg_no,
IFNULL(B.album_count, 0) AS count,
attach_file,
attach_folder
FROM album as A
LEFT OUTER JOIN (
SELECT
c.album_reg_no,
COUNT(*) AS album_count,
c.attach_file,
d.attach_folder
FROM board_file as c
LEFT JOIN board AS d ON (c.board_reg_no= d.reg_no AND d.del_yn='N')
where c.del_yn='N'
GROUP BY album_reg_no
)as B
on (A.reg_no = B.album_reg_no)
WHERE A.code=#{code} AND A.del_yn='N'
GROUP BY A.album_name
order by A.reg_date
여기서 board_file 테이블의 album_main_yn의 y값만 나오게하려면 어떻게해야할까요??
도움좀 부탁드립니다