Добрый день! Помогите разобраться почему при запросе

SELECT t.* FROM (
SELECT title, alias, CONCAT('/novosti/', alias), text AS url FROM news UNION
SELECT title, alias, CONCAT('/bolezni/', alias), text AS url FROM sick UNION
SELECT title, alias, CONCAT('/uslugi/', alias), text AS url FROM usluga
) AS t WHERE t.title LIKE :x

все работает, а при

SELECT t.* FROM (
SELECT title, alias, CONCAT('/novosti/', alias), text AS url FROM news UNION
SELECT title, alias, CONCAT('/bolezni/', alias), text AS url FROM sick UNION
SELECT title, alias, CONCAT('/uslugi/', alias), text AS url FROM usluga
) AS t WHERE t.title LIKE :x OR t.text LIKE :x

ответ:

#1054 - Unknown column 't.text' in 'where clause'

хотя во всех трех таблицах есть поле text ?

да, благодарочка