Entity Framework查询,EF执行SQl

DbSet.SqlQuery 　　　　　　　　　　　　　　　　//查询并返回Entities
DbContext.Database.SqlQuery<T>    　　     //执行某一个查询，并可以将返回集转换为某一对象
DbContext.Database.ExecuteSqlCommand    　 //执行某一并无返回集的SQL 命令，例如UPDATE，DELETE操作

            var list = db.admins.SqlQuery("select * from admin");
            foreach (var item in list)
            {
                Response.Write(item.username);
                Response.Write("<br>");
            }

            var list = db.Database.SqlQuery<admin>("select * from admin").ToList();
            foreach (var item in list)
            {
                Response.Write(item.username);
                Response.Write("<br>");
            }

var res=db.Database.ExecuteSqlCommand("update admin set password=‘123456‘");
            Response.Write(res);

DateTime now = DateTime.Now; 
var res = db.News.Where(p => System.Data.Objects.EntityFunctions.DiffDays(DateTime.Now, p.CreateTime) < 10); 
return res.ToList<News>();