このクエリを実行するとエラーが発生するのはなぜですか?
SELECT
`site_members`.`username`,
`site_members`.`email`,
`site_members`.`ID`,
`site_members`.`firstName`,
`site_members`.`lastName`,
`site_members`.`avatar`,
`site_members`.`avatar_status`,
`site_members_privacy`.`searchable_profile`,
CONCAT(firstName , ' ', lastName ) AS `concat_name`,
`site_members_privacy`.*
FROM `site_members`
LEFT JOIN
`site_members_privacy`
ON site_members.ID = site_members_privacy.memberID
WHERE (email LIKE '%test%' OR CONCAT(firstName , ' ', lastName ) LIKE '%test%')
OR (MATCH(concat_name) AGAINST('test' IN BOOLEAN MODE))
ORDER BY `firstName` ASC, `lastName` ASC, `username` ASC LIMIT 30