Question

原始SQL看起来像：

SELECT MIN(ID) AS GeoID, MIN(PostalCode), PlaceName
    FROM GeoData_ALL
    GROUP BY CountryCode, PlaceName
    ORDER BY PlaceName

我需要在Dynamic Linq中翻译它，例如：

var searchResult = db.Set(GeoData)
    .AsQueryable()
    .OrderBy("PlaceName")
    .GroupBy("CountryCode", "PlaceName")
    .Select("new (MIN(ID) AS GeoID, MIN(PostalCode), PlaceName");

不幸的是＆＃39; MIN＆＃39;功能似乎不适用于Dynamic Linq

Answer 1

以下代码可以提供帮助，请检查（这只是示例代码）：

var searchResult = db.Set(GeoData)
    .AsQueryable()
    .OrderBy("PlaceName")
    .GroupBy("CountryCode", "PlaceName")
    .Select(g => new { GeoID = g.Min(p => p.ID), PostalCode = g.Min(p => p.PostalCode), PlaceName = g.PlaceName });

动态Linq for SQL MIN（）函数

1 个答案: