标签：inf partition 写法 int 分组查询 uid win source key
想实现如下效果，就是分组后时间最大的那一条数据：
1、SQL
SELECT *
FROM ( SELECT * ,
ROW_NUMBER() OVER ( PARTITION BY RIP_GUID ORDER BY RU_CreatedTime DESC ) rn
FROM RIP_FlowInfo
) t
WHERE t.rn <= 1;
2、LINQ
var groupQuery = from t in query group t by t.RIP_Guid into g select new { key = g.Key, source = g.OrderByDescending(tt => tt.RU_CreatedTime).FirstOrDefault() };
SQL Server分组查询某最大值的整条数据（包含linq写法）
标签：inf partition 写法 int 分组查询 uid win source key
原文地址：http://www.cnblogs.com/no27/p/6657156.html
