mysql列轉行以及年月分組實例

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')

其中關鍵在於DATE_FORMAT(submit_date, '%Y-%m')對時間年月進行了分組排序

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 

以上這篇mysql列轉行以及年月分組實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持。