mysql列转行以及年月分组实例
编程学习 2021-07-05 14:36www.dzhlxh.cn编程入门
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如下所示：
SELECT count(DISTINCT(a.rect_id)) zcount, a.job_dept,
DATE_FORMAT(submit_date, '%Y-%m') zsubmit_date
FROM
表名 a
WHERE
a.statu = 3
AND a.rstatu = 2
AND a.job_dept IN ('19', '20', '21')
GROUP BY
a.job_dept,
DATE_FORMAT(submit_date, '%Y-%m')
其中关键在于DATE_FORMAT(submit_date, '%Y-%m')对时间年月进行了分组排序
SELECT
zsubmit_date,
MAX(CASE WHEN job_dept = '19' THEN zcount ELSE 0 END ) 19zcount,
MAX(CASE WHEN job_dept = '20' THEN zcount ELSE 0 END ) 20zcount,
MAX(CASE WHEN job_dept = '21' THEN zcount ELSE 0 END ) 21zcount
FROM
(
SELECT
count(DISTINCT(a.rect_id)) zcount, a.job_dept,
DATE_FORMAT(submit_date, '%Y-%m') zsubmit_date
FROM
表名 a
WHERE
a.statu = 3
AND a.rstatu = 2
AND a.job_dept IN ('19', '20', '21')
GROUP BY
a.job_dept,
DATE_FORMAT(submit_date, '%Y-%m')
) q GROUP BY
zsubmit_date
以上这篇mysql列转行以及年月分组实例就是长沙网络推广分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持狼蚁SEO。