mysql查一个月的所有日期

SELECT DATE_ADD('2023-04-01', INTERVAL n DAY) AS date
FROM (
    SELECT @rownum:=@rownum+1 AS n
    FROM (SELECT 0 UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) r,
         (SELECT 0 UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) s,
         (SELECT @rownum:=0) t
) d
WHERE DATE_ADD('2023-04-01', INTERVAL n DAY) <= LAST_DAY('2023-04-01');