[英]How to set round of the result of aggregate function used in dynamic linq query?
[英]Aggregate function Count() using dynamic linq query
我正在嘗試使用動態linq查詢在某些列上使用Aggregate function
Count() ,但我無法實現,我正在尋找的是
Select Count(Id),Id
from Table1
Group By Id
Having Count(Id) > 1
我想將同一查詢轉換為動態linq查詢,關於如何實現這一點的任何建議?
可能是這樣的
list.GroupBy(item => item.Id)
.Where(group => group.Count() > 1)
.Select(group => new {
Id = group.Key,
Count = group.Count() });
從這里被盜:
var distinctItems =
from list in itemsList
group list by list.ItemCode into grouped
where grouped.Count() > 1
select grouped;
以下兩個查詢將為您提供完全相同的結果:第一個查詢使用lambda,第二個查詢結果不帶。
var Table1 = new List<Row>();
for (int i = 0; i < 10; i++)
{
for (int m = 0; m < 5; m++)
{
for (int x = 0; x < i + m; x++)
{
Table1.Add(new Row() { Id = m });
}
}
}
var result = Table1.GroupBy(row => row.Id)
.Where(p => p.Count() > 1);
var resultB = from row in Table1
group row by row.Id into rowGrouped
where rowGrouped.Count() > 1
select rowGrouped;
foreach (var r in resultB)
{
Console.WriteLine("ID {0} count: {1}", r.Key, r.Count());
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.