在单个查询中选择不同的年份及其月份 - select distinct years and their months in a single query

select distinct years and their months in a single query

本文关键字：查询单个选择 | 更新日期: 2023-09-27

如何从下面的时间戳列中在单个查询中选择不同年份和不同月份

我试过select distinct year(sc_ts) as years from posts where user_id = 1 order by years asc，但不知怎么的，我无法将月份部分放入其中。或者这需要两个不同的语句和php处理。

我打算将其输出为

2009 - Mar, Apr, May
2010 - Apr, Jun, Jul

etc

"2009-03-22 16:07:48"
"2009-04-22 16:07:48"
"2009-05-22 16:07:48"
"2010-04-22 16:07:48"
"2010-06-22 16:07:48"
"2010-07-22 16:07:48"
"2011-01-22 16:07:48"
"2011-02-22 16:07:48"
"2011-05-22 16:07:48"
"2011-06-22 16:07:48"
"2011-08-22 16:07:48"
"2012-01-22 16:07:48"
"2012-02-22 16:07:48"
"2012-03-22 16:07:48"
"2012-04-22 16:07:48"
"2012-08-22 16:07:48"

select distinct year(sc_ts) as years, group_concat(monthname(sc_ts)) as months from posts where user_id = 1 order by years asc

编辑：我最初使用month()，它给出了月份编号，使用monthname()返回月份名称。

SELECT x.`Year`, GROUP_CONCAT(x.`Month`) AS Months
FROM
    (
        SELECT DISTINCT YEAR(sc_ts) AS `Year`, MONTHNAME(sc_ts) AS `Month`
        FROM
            `posts`
        WHERE
            user_id = 1
        ORDER BY
            MONTH(sc_ts)
    ) x
GROUP BY
    x.`Year`
ORDER BY
    x.`Year`

尝试SELECT distinct SUBSTRING(year(sc_ts), 6)