sql SQL Server 2012 TSQL新函数LAG，LEAD，FIRST_VALUE和LAST_VALUE

Posted 2021-05-14

SELECT [Name]
      ,[Subject]
      ,[Score]
      ,LAG(Score, 1, 0) Over (Partition By Name Order By Subject) As [LagValue]
      ,LEAD(Score, 1, 0) Over (Partition By Name Order By Subject) As [LeadValue]
      ,FIRST_VALUE(Score) Over (Partition By Name Order By Subject) As [FirstValue]
      ,LAST_VALUE(Score) Over (Partition By Name Order By Subject) As [LastValue]
  FROM [Test].[dbo].[Score]