SQL中Group分组获取Top N方法实现

1、采用row_number方法。

SELECT *
FROM (SELECT RowNumber =row_number() OVER (PARTITION BY TaskID ORDER BY ProduceDate DESC), * FROM dbo.ShippingDocument)t
WHERE t.RowNumber< 2 ORDER BY t.TaskID ASC

2、采用游标方法。

SQL中Group分组获取Top N方法实现

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