我可以计算每行的利润吗?
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
我想要
| Revenue | Costs | Profit
5500 500 5000

答案 0 :(得分:2)
只需将其放在子查询中:
SELECT Revenue - Costs as Profit
FROM (
SELECT
SUM(CASE WHEN m.billable = 0 THEN r.rate ELSE 0 END) AS Revenue,
SUM(CASE WHEN m.billable = 1 AND m.optimized = 0 THEN r.rate ELSE 0 END) AS Costs
) as temp
答案 1 :(得分:2)
将查询移动到子查询中,然后减去结果。
SELECT Revenue, Costs, Revenue - Costs AS Profit
FROM (
SELECT
SUM(CASE WHEN m.billable = 0 THEN r.rate ELSE 0 END) AS Revenue,
SUM(CASE WHEN m.billable = 1 AND m.optimized = 0 THEN r.rate ELSE 0 END) AS Costs
FROM YourTable) AS x
加入两个表,并显示按帐户分组的结果,它将是:
SELECT client_account_id, mmc, mnc, Revenue, Costs, Revenue - Costs AS Profit
FROM (
SELECT
m.client_account_id, m.mmc, m.mnc
SUM(CASE WHEN m.billable = 0 THEN r.rate ELSE 0 END) AS Revenue,
SUM(CASE WHEN m.billable = 1 AND m.optimized = 0 THEN r.rate ELSE 0 END) AS Costs
FROM messages AS m
JOIN rates AS r ON r.id = m.rate_id
GROUP BY m.client_account_id, m.mmc, m.mnc
) AS x