Fetching data from 3 tables
Please try it.

SELECT f.leaderId, f.followerId, c.ccId, c.ccTitle, c.ccCity, c.ccCountry, c.ccFlag, c.uId, c.ccStartingDate, c.ccCreatedAt, l.uId, l.ccId
        FROM  conferencecreate c
left join followingrelations f on c.uId = f.leaderId
left join likesbyuser l on  (c.ccStartingDate &gt;= 'current_time_and_date_now' or l.uId = f.leaderId )
        WHERE f.followerId = 'login_user_id'
        AND c.ccFlag = 1
        GROUP BY c.ccTitle 
        ORDER BY c.ccId DESC