环境

centos7,postgresql-11,mysql5.7 一般group by后统计数据后，还想算个汇总数，可以使用以下方法

postgres

使用GROUPING SETS ( ( 字段 ), ( ) )函数

SELECT
r.cmd_id,
c."name",
SUM ( r.send_count ) success,
SUM ( r.fail_count ) fail  ,
round( 100 * SUM(r.send_count) * 1.0 /  ( SUM(r.send_count)+SUM(r.fail_count) )  ) || '%' rate
FROM
run_cmd r left join  cfg_cmd c on r.cmd_id=c.id
WHERE
r.gmt_create BETWEEN '2023-7-13 10:00:00' 
AND '2023-7-13 13:00:00' 
AND ( r.send_count != 0 OR r.fail_count != 0 ) 

GROUP BY
GROUPING SETS ( ( r.cmd_id,c.name ), ( ) )
ORDER BY fail

mysql

使用WITH ROLLUP函数

SELECT
    count( 1 ),
    CellId 
FROM
    `tagreportlog` 
WHERE
    LocationTime > '2025-01-01' 
GROUP BY
    CellId WITH ROLLUP