mysql列转行以及年月分组实例
如下所示：
SELECTcount(DISTINCT(a.rect_id))zcount,a.job_dept,
DATE_FORMAT(submit_date,'%Y-%m')zsubmit_date
FROM
表名a
WHERE
a.statu=3
ANDa.rstatu=2
ANDa.job_deptIN('19','20','21')
GROUPBY
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(CASEWHENjob_dept='19'THENzcountELSE0END)19zcount,
MAX(CASEWHENjob_dept='20'THENzcountELSE0END)20zcount,
MAX(CASEWHENjob_dept='21'THENzcountELSE0END)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
ANDa.rstatu=2
ANDa.job_deptIN('19','20','21')
GROUPBY
a.job_dept,
DATE_FORMAT(submit_date,'%Y-%m')
)qGROUPBY
zsubmit_date
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