C# 将列转换为行,将日期行转换为列
这是一个ASP.NET MVC项目。目前,我有一个表,如:C# 将列转换为行,将日期行转换为列,c#,sql,asp.net-mvc,linq,transpose,C#,Sql,Asp.net Mvc,Linq,Transpose,这是一个ASP.NET MVC项目。目前,我有一个表,如: Skill Date Offered Answered Abandoned SampleSkill1 12/1/2013 53585 52549 1036 SampleSkill2 12/1/2013 7170 6997 173 SampleSkill1 11/1/2013 45635 45189
Skill Date Offered Answered Abandoned
SampleSkill1 12/1/2013 53585 52549 1036
SampleSkill2 12/1/2013 7170 6997 173
SampleSkill1 11/1/2013 45635 45189 446
SampleSkill2 11/1/2013 6481 6378 103
SampleSkill1 10/1/2013 54838 54208 630
SampleSkill2 10/1/2013 7361 7235 126
我试图在如下表格中获取数据:
样本杀手1
Type Oct Nov Dec
Offered 53585 52549 1036
Answered 45635 45189 446
Abandoned 54838 54208 630
我能做的最接近的事情是这样做:
var StatsList = db.Stats.Where(c => c.Skill == "SampleSkill1").ToList();
var OfferedStatsQuery = StatsList
.GroupBy(c => c.Skill)
.Select(g => new StatsPivot {
Skill = g.Key,
Oct = g.Where(c => c.Date.Month == 10).Sum(c => c.Offered),
Nov = g.Where(c => c.Date.Month == 11).Sum(c => c.Offered),
Dec = g.Where(c => c.Date.Month == 12).Sum(c => c.Offered)
});
var AnsweredStatsQuery = StatsList
.GroupBy(c => c.Skill)
.Select(g => new StatsPivot {
Skill = g.Key,
Oct = g.Where(c => c.Date.Month == 10).Sum(c => c.Answered),
Nov = g.Where(c => c.Date.Month == 11).Sum(c => c.Answered),
Dec = g.Where(c => c.Date.Month == 12).Sum(c => c.Answered)
});
我确信这不是做这样事情的最佳/正确方式,但我对LINQ是新手。关于如何有效地实现预期结果,有什么建议吗?我的建议是在数据库端(可能通过存储过程)而不是在代码中执行。不太确定这个建议是否对你有限制,因为这样你的工作就会变得非常简单、高效,你也会有很多选择。查看链接以获得类似问题的答案
希望这对您有所帮助。当您使用Linq进行此类操作时。修改代码并不容易。所以试着从数据库的角度来做这些事情 请参见以下示例