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我可以计算每行列利润?如何计算两列之间的差异与结果
SELECT
SUM(CASE WHEN m.billable = 0 THEN r.rate ELSE 0 END) AS Revenue, -- 33 + 34 + 456 + 52...etc = 5500
SUM(CASE WHEN m.billable = 1 AND m.optimized = 0 THEN r.rate ELSE 0 END) AS Costs,-- 33 + 4...etc = 339
5500 - 339 AS Profit -- I need to get this difference
FROM messages AS m
JOIN rates AS r ON (r.id = m.rate_id )
GROUP BY
m.client_account_id,
m.mcc,
m.mnc
我想
| Revenue | Costs | Profit
5500 500 5000
SELECT收入,COS ......从消息)为X FROM为M的邮件| 19:47:44内核错误:错误(1064)42000:“您的SQL语法有错误;请检查与您的MySQL服务器版本对应的手册,以便在'FROM消息附近使用AS m FROM消息AS m – AxOn
在同一查询中不能有两个FROM字段 – Barmar
我更新了更全面的查询,但我需要使用消息表/我们可以用它做什么? – AxOn