摘要:
sql SELECT * FROM (select ROW_NUMBER()over(partition by Id order by CollTime desc) AS newIndex,* from Table) as T where T.newIndex=1 结果: lambda 方式一 va 阅读全文
摘要:
分组后将Name以“,”分隔进行拼接 var result = _dataRepository.GetAll().GroupBy(g => g.Id) .Select(s => new { Id = s.Key, Name = string.Join(",", s.Select(d => d.Nam 阅读全文