Question

我正在转换为SQL Server的Oracle查询

select
    (select LISTAGG(mycase, ', ') WITHIN GROUP (ORDER BY my_gross_amount)
    from
         (select * 
           from (   select th.CONTACT_ID,
                         th.created_dt,
                         sum(th.my_gross_amount) my_gross_amount,
                         mycase
                   from mySch.trans_his th
                   join mySch.fund f on f.fund = th.fund
                   group by contact_id, th.created_dt, mycase) 
         where rownum < 4 ) a
    group by contact_id, created_dt
    ) as DetailNotes
from mySch.trans_his t

我已转换的MS SQL查询

select 
      (select STUFF((
                SELECT ', '+ mycase 
                from (select TOP(3) th.CONTACT_ID,
                                    th.created_dt,
                                    sum(th.my_gross_amount) my_gross_amount,
                                    mycase
                       from mySch.dbo.trans_his th
                       join mySch.dbo.fund f on f.fund = th.fund
                       group by contact_id, th.created_dt, mycase)subQueryA
                Where subQueryA.my_gross_amount = subQueryB.my_gross_amount FOR XML PATH('')),1 ,1, '') 
        from (select TOP (3) th.CONTACT_ID,
                             th.created_dt,
                             sum(th.my_gross_amount) my_gross_amount,
                             mycase
               from mySch.dbo.trans_his th
               join mySch.dbo.fund f on f.fund = th.fund
               group by contact_id, th.created_dt, mycase) subQueryB
        group by contact_id, created_dt, my_gross_amount
        ) as DetailNotes
from mySch.dbo.trans_his t

同样的查询在Oracle中需要几秒钟，但在sql server中永远需要。不确定这是否是将listAgg从oracle转换为SQl服务器的最佳方法。并且不确定SQL查询是否卡在循环中。

Oracle Version 12c
MS SQL 2016版

有没有更好的方法在SQL Server中重写此查询？

使用以下链接转换ListAgg函数

ListAGG in SQLSERVER

更新：

trans_his table details

trans_id    varchar2(20)            
firm_id varchar2(20)    
fund varchar2(20)
contact_id  varchar2(20)            
trade_cl    varchar2(2)         
my_gross_amount number(15,2)        
created_dt  date

资金表详情

fund    varchar2(20)                
mycase  varchar2(100)       
start_date  date    
end_date    date
created_by  varchar2(20)        
created_dt  date

将ListAGG转换为SQL Server

0 个答案: