MySQL中使用CTE获取时间段数据的技巧分享

WITH RECURSIVE month_12 AS (
    SELECT CURDATE() AS date_day
    UNION ALL
    SELECT DATE_SUB(date_day, INTERVAL 1 MONTH)
    FROM month_12
    WHERE date_day > DATE_SUB(CURDATE(), INTERVAL 11 MONTH)
),
mon_12 AS (
 SELECT DATE_FORMAT(date_day, '%Y-%m') AS label FROM  month_12 ORDER BY date_day desc
)
 
select * from mon_12 

WITH RECURSIVE week_date_12 AS (
    SELECT CURDATE() AS date_day
    UNION ALL
    SELECT DATE_SUB(date_day, INTERVAL 1 week)
    FROM week_date_12
    WHERE date_day > DATE_SUB(CURDATE(), INTERVAL 11 week)
),
week_12 AS (
 SELECT DATE_FORMAT(date_day, '%Y-%u') AS label FROM  week_date_12 ORDER BY date_day desc
)
SELECT label
FROM week_12

WITH RECURSIVE last_four_quarters AS (
    SELECT 
        YEAR(CURDATE()) AS year,
        QUARTER(CURDATE()) AS quarter
    UNION ALL
    SELECT 
        CASE 
            WHEN quarter = 1 THEN year - 1 
            ELSE year 
        END,
        CASE 
            WHEN quarter = 1 THEN 4 
            ELSE quarter - 1 
        END
    FROM last_four_quarters
    WHERE year > YEAR(DATE_SUB(CURDATE(), INTERVAL 1 YEAR)) OR quarter > QUARTER(DATE_SUB(CURDATE(), INTERVAL 1 YEAR))
)
SELECT CONCAT(year, '-Q', quarter) AS year_quarter
FROM last_four_quarters
ORDER BY year DESC, quarter DESC;

SELECT DATE_FORMAT(DATE_SUB(CURDATE(), INTERVAL 12 MONTH), '%Y-%m-01') AS first_day_of_month;

select LAST_DAY(DATE_SUB(CURDATE(), INTERVAL 11 MONTH) - INTERVAL 1 MONTH) + INTERVAL 1 DAY

SELECT DATE_SUB(DATE_SUB(CURDATE(), INTERVAL 12 WEEK), INTERVAL WEEKDAY(DATE_SUB(CURDATE(), INTERVAL 12 WEEK)) DAY) AS first_day_of_week;