c# - 选择最小和最大 LINQ

Question

select description, min(date), max(date), sum(value1), sum(value2) from table
where description = 'Axxx' and filter = 'L'
group by description

如何使用 Linq/C# 执行此查询？

Answer 1

未测试，但以下应该有效:

table
   .Where(x=>x.description=="Axxx" && x.filter=="L")
   .GroupBy(x=>x.description)
   .Select(x=>new {
       description=x.Key,
       mindate=x.Min(z=>z.date),
       maxdate=x.Max(z=>z.date),
       sumvalue1=x.Sum(z=>z.value1),
       sumvalue2=x.Sum(z=>z.value2)
    });