关于 sql:Dividing SUM By A Distinct Count 报错

Dividing SUM By A Distinct Count and getting an error

我在以下查询中收到 ORA-00937(不是按功能分组的单组)。请问有什么想法吗？查询只是将 SUM 除以 Count。

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SELECT SUM(DISTINCT CE.USD_NOTIONAL)/(SELECT COUNT(DISTINCT MARKET_DATE) FROM DATA_EURO_YTD WHERE MARKET_DATE >= TO_DATE('2019-01-01','YYYY-MM-DD'))
FROM CE
WHERE CE.tradedate >= '01-JAN-2019'
AND CE.exchange IN (SELECT DISTINCT EXCHANGE FROM exchange EX
WHERE EX.FEED IN ('Y'))

相关讨论

将子查询移动到 FROM 子句：

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SELECT SUM(DISTINCT CE.USD_NOTIONAL) / MAX(dey.cntd)
FROM CE CROSS JOIN
(SELECT COUNT(DISTINCT MARKET_DATE) AS cntd
FROM DATA_EURO_YTD
WHERE MARKET_DATE >= DATE '2019-01-01'
) dey
WHERE CE.tradedate >= DATE '2019-01-01' AND
CE.exchange IN (SELECT EXCHANGE
FROM exchange EX
WHERE EX.FEED IN ('Y')
);

注意事项：

将子查询移到 FROM 子句几乎可以解决整个问题。您仍然需要围绕该值进行聚合。
SELECT DISTINCT 在 IN 子查询中是多余的。
我修复了日期以使用日期文字的 DATE 前缀。