【发布时间】:2011-04-18 06:14:30
【问题描述】:
这是mysql查询:
SELECT count(PVersion), PVersion
FROM [Products].[dbo].[Active_Details]
group by PVersion
order by count(PVersion);
它的 LINQ to SQL 是什么。
【问题讨论】:
这是mysql查询:
SELECT count(PVersion), PVersion
FROM [Products].[dbo].[Active_Details]
group by PVersion
order by count(PVersion);
它的 LINQ to SQL 是什么。
【问题讨论】:
应该是一组成:
var product = (
from p in yourContext.Active_Details
group p by p.PVersion into pgroup
select new { VersionCount= pgroup.Count(), pgroup.Key }
).OrderBy(x=>x.VersionCount);
这是MSDN Resource 的示例
【讨论】:
试试这个:
var product =
from p in yourContext.Active_Details
group p by p.PVersion into pgroup
let count = pgroup.Count()
orderby count
select new { Count = count, PVersion = pgroup.Key };
SELECT count(ProductVersion), ProductVersion , ProductID , SubProductID
FROM [do-not-delete-accounts].[dbo].[Activation_Details]
group by ProductVersion,ProductID,SubProductID
order by count(ProductVersion);
var query =
from p in yourContext.Activation_Details
group p by new
{
ProductVersion = p.ProductVersion,
ProductID = p.ProductID,
SubProductID = p.SubProductID
}
into pgroup
let count = pgroup.Count()
orderby count
select new
{
Count = count,
ProductVersion = pgroup.Key.ProductVersion,
ProductID = pgroup.Key.ProductID,
SubProductID = pgroup.Key.SubProductID
};
【讨论】: