Question

以下SQL用于在LastDate中存在差异时识别唯一的电话。但是，如果重复的手机具有完全相同的LastDate，则它不起作用。

任何想法都会受到赞赏。

SELECT * FROM
 (
  SELECT  ID, Phone, [LastDate]
  ,RANK() OVER (PARTITION BY Phone ORDER BY [LastDate]) AS 'RANK',                          
            COUNT(Phone) OVER (PARTITION BY  Phone) AS 'MAXCOUNT'
              FROM MyTable          
              WHERE Groupid = 5
              ) a
              WHERE [RANK] = [MAXCOUNT]

Answer 1

更改RANK的{{1}}。

ROW_NUMBER

使用Rank over Partition查找重复项

1 个答案: