SUM(UNIX_TIMESTAMP(paytime)-UNIX_TIMESTAMP(ordertime)) FROM pay_brazil_order_info WHERE `status` = 2 ORDER BY paytime DESC LIMIT 500;优化建议

可以优化的地方有： 1. 子查询可以改为使用 JOIN，例如： ``` SELECT status_description FROM dwd_t_code_value WHERE storage_status = '07' ``` 改为： ``` SELECT t2.status_description FROM ( SELECT status_description, storage_status FROM dwd_t_code_value ) t2 WHERE t2.storage_status = '07' ``` 2. 使用 EXISTS 或者 IN 替换掉子查询，例如： ``` IFNULL(SUM(`local_action` = (SELECT status_description FROM dwd_t_code_value WHERE storage_status = '07')), 0) AS active ``` 改为： ``` IFNULL(SUM(`local_action` IN (SELECT status_description FROM dwd_t_code_value WHERE storage_status = '07')), 0) AS active ``` 或者： ``` IFNULL(SUM(EXISTS (SELECT 1 FROM dwd_t_code_value WHERE storage_status = '07' AND status_description = `local_action`)), 0) AS active ``` 3. 可以考虑将 FROM_UNIXTIME 和 UNIX_TIMESTAMP 改为 DATE_FORMAT 和 STR_TO_DATE，以避免频繁的数据类型转换。 综上所述，优化后的 SQL 可能类似于以下内容： ``` SELECT `msisdn`, `relationship_account` AS relationshipAccount, '' AS relationshipName, IFNULL(SUM(`dual_time`), 0) AS totalTime, IFNULL(COUNT(1), 0) AS totalCall, IFNULL(SUM(`local_action` IN (SELECT status_description FROM dwd_t_code_value WHERE storage_status = '07')), 0) AS active, IFNULL(SUM(`local_action` IN (SELECT status_description FROM dwd_t_code_value WHERE storage_status = '08')), 0) AS passive, IFNULL(SUM(`call_status` IN (SELECT status_description FROM dwd_t_code_value WHERE storage_status = '09')), 0) AS success, IFNULL(SUM(`call_status` IN (SELECT status_description FROM dwd_t_code_value WHERE storage_status = '10')), 0) AS fail, DATE_FORMAT(MIN(STR_TO_DATE(`start_time`, '%Y-%m-%d %H:%i:%s')), '%Y-%m-%d %H:%i:%s') AS onceCallTime, DATE_FORMAT(MAX(STR_TO_DATE(`start_time`, '%Y-%m-%d %H:%i:%s')), '%Y-%m-%d %H:%i:%s') AS endCallTime FROM `dwd_t_call_record` WHERE `person_no` = '653129200105072624' GROUP BY `relationship_account` ORDER BY `start_time` ASC ```

您的脚本中出现了一个语法错误。错误信息显示在第1行第12列的位置，错误标记为"VARIANT"。根据提供的信息，我无法确定问题的确切原因。请检查脚本中的语法和变量使用，并确保变量被正确声明和定义。另外，还要确保您具有执行此脚本所需的适当权限。如果问题仍然存在，请提供更多的上下文信息，以便我可以更好地帮助您解决问题。