如何将 T-SQL 转换为 LINQ

Question

我在 T-SQL 查询中有以下代码，我需要将其转换（重写）为 LINQ。有人可以帮助我吗？谢谢

SELECT (select max(X.PocetDniPoPlatnosti) 
from
(

select 

(select top 1 datediff(day,datumplatnosti,getdate()) from planrealizace p 
where p.cinnostsopidsop = cinnostsop.idsop and datumplatnosti <= getdate() and p.provest = 1 and p.datumprovedeni is null
order by p.datumplatnosti desc) as PocetDniPoPlatnosti

from cinnostsop
where cinnostSOP.LegislativneVyznamna = 1 and (CinnostSOP.ObjektId = 131476)) X) as PoPlatnosti

Answer 1

这应该可以，但我无法尝试，因为我家里没有任何编程工具，所以如果这不起作用，请随时告诉我，我们可以一起改进它

var max = (from cp in cinnostsop.Where(c => c.LegislativneVyznamna = 1 && c.ObjektId = 131476) 
           join p in (
               planrealizace.
               Where(pz => pz.datumplatnosti <= DateTime.Now && 
                           pz.provest = 1 and pz.datumprovedeni is null).
               GroupBy(pz => pz.cinnostsopidsop, pz => pz).
               Select(g => 
                   new { 
                           id = g.Key, 
                           firstdate = (g.OrderByDescending(
                                              pz => pz.datumplatnosti).
                                          First().datumplatnosti - DateTime.Now
                                        ).Totaldays
                        })
               ) on cp.idsop equals p.id
           select p.firstdate).Max(d => d);