如何使用具有最大日期的行进行 LEFT JOIN？

Question

我在 Oracle DB 中有两个表

Person (
  id
)

Bill (
  id,
  date,
  amount,
  person_id
)

如果存在，我需要从最后一张账单中获取人和金额。我试图这样做

SELECT
  p.id,
  b.amount
FROM Person p
LEFT JOIN Bill b
ON b.person_id = p.id AND b.date = (SELECT MAX(date) FROM Bill WHERE person_id = 1)
WHERE p.id = 1;

但此查询仅适用于 INNER JOIN。在 LEFT JOIN 的情况下，它会抛出ORA-01799 a column may not be outer-joined to a subquery

如何使用左连接从最后一张账单中获得金额？

Answer 1

请尝试以下避免子查询被外部连接

SELECT
 p.id,
 b.amount
 FROM Person p
 LEFT JOIN(select * from Bill where date =
 (SELECT MAX(date) FROM Bill b1 WHERE person_id = 1)) b ON b.person_id = p.id 
 WHERE p.id = 1;