如何在 LINQ 查询中使用 GROUP BY 获取 MAX 行? [英] How do I get the MAX row with a GROUP BY in LINQ query?

问题描述

我正在 LINQ 中寻找一种方法来匹配以下 SQL 查询.

I am looking for a way in LINQ to match the follow SQL Query.

Select max(uid) as uid, Serial_Number from Table Group BY Serial_Number

真的在寻找这方面的帮助.由于 Group By 语法，上述查询获取每个序列号的最大 uid.

Really looking for some help on this one. The above query gets the max uid of each Serial Number because of the Group By Syntax.

推荐答案

        using (DataContext dc = new DataContext())
        {
            var q = from t in dc.TableTests
                    group t by t.SerialNumber
                        into g
                        select new
                        {
                            SerialNumber = g.Key,
                            uid = (from t2 in g select t2.uid).Max()
                        };
        }

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