Question

如何按原始结果的结果分组并返回同一个选择查询？

我有一个表#t，其中包含Bill Id，并且在工作流程周期中出现了错误。一个账单ID可能经历了多次相同的错误类型或不同的错误类型。

我想为每个帐单ID选择不同的错误类型，并获得按错误计数的组。

根据不同的错误，错误计数，我需要在同一个表中获取错误类型计数和错误类型。

我不知道该怎么做。我在此帖子中保留了示例查询和预期结果。

create table #t 
(
    BillId int,
    StepName varchar(100),
    StepExec varchar(100),
    StepExecResult varchar(100),
    Created_date datetime
)

insert into #t 
values
    (1, 'Initiated', 'Taken Place','Pass', getdate()-10),
    (1, 'POS', 'Deadlock Error','Error', getdate()-9),
    (1, 'POS', 'Processed','Pass', getdate()-9),
    (1, 'Merchandise', 'Taken Place','Pass', getdate()-8),
    (1, 'verification', 'Webservice call error','Error', getdate()-7),
    (1, 'verification', 'Webservice call error','Error', getdate()-6),
    (1, 'verification', 'Webservice call','Pass', getdate()-5),
    (1, 'verification', 'Webservice Response','Error', getdate()-5),
    (1, 'verification', 'Webservice Response','Pass', getdate()-5),
    (1, 'verification', 'Timeout Error','Error', getdate()-5),
    (1, 'verification', 'Timeout Error','Error', getdate()-5),
    (1, 'verification', 'Timeout Error','Error', getdate()-5),
    (1, 'verification', '','Pass', getdate()-5),
    (1, 'Payment', 'calculationError','Error', getdate()-4),
    (1, 'Payment', 'calculationProcessed','Pass', getdate()-3),
    (1, 'Completed', 'Archived','Pass', getdate()-1),
    (2, 'Initiated', 'Taken Place','Pass', getdate()-10),
    (2, 'POS', 'Deadlock Error','Error', getdate()-9),
    (2, 'POS', 'Processed','Pass', getdate()-9),
    (2, 'Merchandise', 'Taken Place','Pass', getdate()-8),
    (2, 'verification', 'Webservice call error','Error', getdate()-7),
    (2, 'verification', 'Webservice call error','Error', getdate()-6),
    (2, 'verification', 'Webservice call','Pass', getdate()-5),
    (2, 'verification', 'Webservice Response','Error', getdate()-5),
    (2, 'verification', 'Webservice Response','Pass', getdate()-5),
    (2, 'verification', '','Pass', getdate()-5),
    (2, 'Payment', 'calculationProcessed','Pass', getdate()-3),
    (2, 'Completed', 'Archived','Pass', getdate()-1)

select * 
from #t
order by Created_date desc

select * 
from #t 
where StepExecResult = 'Error'

;With cte as
(
    select 
        *,
        row_number() over (partition by Billid,StepExec order by StepExecResult) as rownum
    from   
        #t 
    where 
        StepExecResult = 'Error'
)
select *  
from cte 
where rownum = 1

select 
    stepname, count(*) as ErrorCount 
from 
    #t
where 
    StepExecResult = 'Error'
group by 
    stepname

预期输出

StepName     TotalStepError     ErrorType       ErrorTypeCount
--------------------------------------------------------------
Payment             1           calculationError        1
POS                 2           Deadlock Error          2
verification        5           Timeout Error           1
verification        5           Webservice Response     2
verification        5           Webservice call error   2

Answer 1

您可以获得由StepName和StepExec为ErrorTypeCount分组的BillId的明显计数。然后只使用窗口函数对每个StepName的计数求和

SELECT  StepName ,
        SUM(COUNT(DISTINCT BillId)) OVER (PARTITION BY StepName) TotalStepError,
        StepExec ,
        COUNT(DISTINCT BillId) ErrorTypeCount
FROM    #t
WHERE   StepExecResult = 'Error'
GROUP BY StepName,
        StepExec

如何按原始结果的结果分组并返回相同的选择查询？

1 个答案: