SELECT
date_sub( curdate( ), INTERVAL 7 DAY ) AS a UNION
SELECT
date_sub( curdate( ), INTERVAL 6 DAY ) AS a UNION
SELECT
date_sub( curdate( ), INTERVAL 5 DAY ) AS a UNION
SELECT
date_sub( curdate( ), INTERVAL 4 DAY ) AS a UNION
SELECT
date_sub( curdate( ), INTERVAL 3 DAY ) AS a UNION
SELECT
date_sub( curdate( ), INTERVAL 2 DAY ) AS a UNION
SELECT
date_sub( curdate( ), INTERVAL 1 DAY ) AS a
FROM DUAL