问题描述
SELECT *,dense_rank() OVER (PARTITION BY email
ORDER BY priority_score,comp) AS r
FROM main_query
WHERE NOT EXISTS
(SELECT name,event,email,report_date
FROM gm
WHERE gm.name= main_query.name
AND gm.event= main_query.event
AND gm.email = main_query.email
AND gm.report_date >= (CURRENT_DATE - 25)::date)
ORDER BY priority_score ASC
我看到的一种克服这些类型错误的解决方案是能够在不相关的查询 (sherlock) 中转换相关的子查询。因此,我正在寻找其他使用 where not exists
语句但没有相关子查询的方法,即在子查询 ((...)main_query
(.. .))。有谁知道这是否可能以及如何做到这一点?
非常欢迎任何建议,并在此先感谢!
解决方法
LEFT JOIN
版本有效吗?
SELECT mq.*,dense_rank() OVER (PARTITION BY mq.email
ORDER BY mq.priority_score,comp
) AS r
FROM main_query mq LEFT JOIN
gm
ON gm.name = mq.name AND
gm.event= mq.event AND
gm.email = mq.email AND
gm.report_date >= (CURRENT_DATE - 25)::date)
WHERE gm.name IS NULL
ORDER BY priority_score ASC;
如果这不起作用,它应该像这样工作:
SELECT mq.*,comp
) AS r
FROM main_query mq LEFT JOIN
(SELECT gm.*
FROM gm
WHERE gm.report_date >= (CURRENT_DATE - 25)::date)
) gm
ON gm.name = mq.name AND
gm.event= mq.event AND
gm.email = mq.email
WHERE gm.name IS NULL
ORDER BY priority_score ASC