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您好我正在使用下面的查詢來選擇studentId和Score1從table1現在我想選擇用戶,我從table2選擇他們的ID,我怎麼可以選擇它與ID? 我可以選擇用戶與此查詢from v in dc.tbl_Students select v
但我想選擇一些用戶,我有他們的ID。從linq中選擇一些ID
var qBestMan = (from T in (((from tbl_ActPoints in dc.tbl_ActPoints
select new
{
StudentId = (int?)tbl_ActPoints.StudentId,
Score = (int?)tbl_ActPoints.Score
}).Concat(
from tbl_EvaPoints in dc.tbl_EvaPoints
select new
{
StudentId = (int?)tbl_EvaPoints.StudentId,
Score = (int?)tbl_EvaPoints.Score
})))
group T by new
{
T.StudentId
} into g
orderby g.Sum(p => p.Score) descending
select new
{
g.Key.StudentId,
HighScoreUser = g.Sum(p => p.Score)
}).ToArray();