sql - 将其转换为一个简单的查询

Question

我想通过使用一个选择语句而不是这些许多子查询并将外部应用转换为左外部连接来将查询优化为一个简单的查询。可能吗？

   select  (select LTRIM(pr.ProcRle)+',' as [text()]  
   from (  select c1.ProcRle, RN=MIN(c1.rn1)
     from (select RN1, fai.ProcRle
        from #AuditPattern fai
        where fai.IncKey=i.IncKey
        ) c1
     outer apply (
        select top 1 e=c2.rn1
        from (select RN1, ProcRle
        from #AuditPattern fai 
        where fai.IncKey=i.IncKey
        ) c2
        where 
        c1.RN1<c2.RN1 and c1.ProcRle <> c2.Procl
        order by c2.RN1) x
     group by x.e, c1.ProcRle
      ) msq2
      join ProcRle pr on msq2.ProcRle=pr.ProcRle    
     order by msq2.RN
   for XML PATH ('')) as [Path]
from FcIncs fi 
join incdnt i on fi.IncKey=i.IncKey