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合计count的总值

multiple-columns sum count sql mysql

Moeez · 技术社区 · 7 年前

我知道怎么做 count 或采取 sum 但我的问题不同。

以上是我的盘点清单。我想把我所有的3列数加起来 7+68+13....= sum

SELECT COUNT(DISTINCT od.`meter_serial`) AS 'OGP Created', 
COUNT(DISTINCT mp.`meter_id`) AS 'Installed & Un-Verified Meters', 
COUNT(DISTINCT ins.`meter_msn`) AS 'Installed & Verified', 
sd.`sub_div_code` AS 'SD Code',sd.`name` AS 'SD-Name'
FROM `ogp_detail` od
INNER JOIN `survey_hesco_subdivision` sd ON od.`sub_div` = sd.`sub_div_code`
LEFT JOIN `meter_ping` mp ON od.`meter_id` = mp.`meter_id`
LEFT JOIN `installations` ins ON od.`meter_serial` = ins.`meter_msn`
WHERE od.`meter_type` = '3-Phase'
GROUP BY sd.`name`

我想在每个 3 列同时显示计数。

任何帮助都将不胜感激。

1 回复 | 直到 7 年前

Thorsten Kettner 7 年前

或者简单地添加表达式

COUNT(DISTINCT od.meter_serial) + 
COUNT(DISTINCT mp.meter_id) + 
COUNT(DISTINCT ins.meter_msn) AS total

或者将查询设为子查询:

select
  "OGP Created", 
  "Installed & Un-Verified Meters",
  "Installed & Verified",
  "OGP Created" + "Installed & Un-Verified Meters" + "Installed & Verified" as total
from ( your query here ) q;