已知 accountnumber 上有索引，sale20230525tmp为临时表 这段 sql 可以怎么优化 delete FROM ddm_raw_data_b2b20230525 drdb WHERE EXISTS( SELECT 1 FROM ( SELECT B.min_d, B.max_d, account.accountId FROM ( SELECT channel_erpno,max(saleto_date) as max_d,min(saleto_date) as min_d FROM sale20230525tmp GROUP BY channel_erpno) AS B LEFT JOIN account ON B.channel_erpno = account.accountnumber ) AS A WHERE A.accountId = drdb.from_accountid AND drdb.saleto_date :: date >= A.min_d :: date AND drdb.saleto_date :: date <=a.max_d :: date );

可以尝试以下几个优化方式：

1. 将子查询中的 SELECT 1 改为 SELECT NULL，这样可以少一步查询。
2. 使用 INNER JOIN 代替 EXISTS 子查询，因为 EXISTS 子查询会在每个行上执行，而 INNER JOIN 可以在一开始执行。
3. 将子查询中的日期强制转换移至外面的 WHERE 子句中，以避免在子查询中对每个行都执行日期转换操作。
4. 对 accountnumber 和 saleto_date 字段创建索引，这样查询会更快速。

修改后的 SQL 语句如下所示：

DELETE FROM ddm_raw_data_b2b20230525 drdb 
WHERE drdb.from_accountid IN (
  SELECT A.accountId 
  FROM (
    SELECT B.channel_erpno, MAX(saleto_date) AS max_d, MIN(saleto_date) AS min_d 
    FROM sale20230525tmp 
    GROUP BY channel_erpno
  ) AS B 
  INNER JOIN account ON B.channel_erpno = account.accountnumber 
  INNER JOIN (
    SELECT saleto_date, 
           accountid, 
           MIN(saleto_date) OVER (PARTITION BY accountid) AS min_date, 
           MAX(saleto_date) OVER (PARTITION BY accountid) AS max_date 
    FROM ddm_raw_data_b2b20230525 
  ) AS C ON C.accountid = account.accountid 
  WHERE drdb.saleto_date::date >= C.min_date::date 
    AND drdb.saleto_date::date <= C.max_date::date
);

注意：以上优化仅供参考，需要根据具体情况进行测试和调整。