“yyy”中的PostgreSQL错误-值应为整数

我在PostgreSQL上编写了以下命令：

create table Daily_Winners as (
    select d.* from 
    (
        select row_number() over(partition by "request_date",
                                              "revised_circle" 
                                 order by "earned_score" desc,
                                          "count_of_attempts" asc) rn,
                * 
        from 
        (
            select a.*,b.count_of_attempts, last_que_attempt 
            from
            (
                select msisdn, revised_circle, 
                       to_date(left(a.request_date,10),'yyyy-mm-dd')request_date,
                       sum(cast(score as numeric(10,0))) Earned_Score 
                from Airtel_season13_circles_final a  
                where upper(a.ans_type)='CA' 
                group by Revised_Circle, 
                         to_date(left(a.request_date,10),'yyyy-mm-dd'),
                         msisdn
            )a 
            join 
            (
                select distinct revised_circle, 
                       to_date(left(a.request_date,10),'yyyy-mm-dd')request_date,
                       msisdn,
                       count(distinct transaction_id) count_of_attempts, 
                       max(to_timestamp(request_date, 'YYYY-MM-DD HH24:MI:SS')::timestamp without time zone)last_que_attempt 
                from Airtel_season13_circles_final a 
                group by revised_circle, 
                         to_date(left(a.request_date,10),'yyyy-mm-dd'),
                         msisdn
            )b 
            on a.msisdn=b.msisdn and a.revised_circle=b.revised_circle
            and a.request_date=b.request_date
        )c
    )d 
     where d.rn<=20)

执行此操作时出现以下错误：

错误：yyyy的requ值无效 详细信息：值必须是 整数

有人能帮忙吗？如有任何建议，将不胜感激。谢谢。

您的字段请求日期似乎是一个文本，对于至少一行，最左边的4个字符不是4位，而是字符串REQU

尝试将字符串转换为日期时，指定了格式，并且没有与指定格式兼容的值

->您必须过滤坏数据，或者修复字符串的ExactAction，或者更好地将日期保存在日期字段中