[英]How to convert SQL select Count with group by clauses into LINQ?
How can I convert the following SQL query into LINQ? 如何将以下SQL查询转换为LINQ?
SELECT [EmpUserName],[LeaveTypeName],Count([NoOfDays]) as 'Count'
FROM [NSL.LeaveSystem02].[dbo].[ProcessedCPLeaves]
GROUP BY [LeaveTypeName],[EmpUserName],[ProcessingDate]
Please Help. 请帮忙。
Thanks 谢谢
give this a try, 试试看
from a in ProcessedCPLeaves
group a by new
{
LeaveTypeName = a.LeaveTypeName,
EmpUserName = a.EmpUserName,
ProcessingDate = a.ProcessingDate
} into g
select new
{
EmpUserName = g.Key.EmpUserName
LeaveTypeName = g.Key.LeaveTypeName
TotalCount = g.Count()
}
Following is method syntax 以下是方法语法
ProcessedCPLeaves
.GroupBy(item => new {
LeaveTypeName = item.LeaveTypeName,
EmpUserName = item.EmpUserName,
ProcessingDate = item.ProcessingDate
}).Select (grouping => new {
EmpUserName =grouping.Key.EmpUserName,
LeaveTypeName = grouping.Key.LeaveTypeName,
TotalCount= grouping.Count()
});
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.