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我尝试了以下方法从 SQL 结果集中获取两者之间的日期差异。我查了谷歌但没有运气，所以我创建了下面的脚本来完成同样的事情。希望能帮助到你。

--- Query to get date difference between two rows 

declare @table table (olddate datetime, newdate datetime)
create table #table (olddate datetime, newdate datetime)

DECLARE db_cursor CURSOR FOR 

  SELECT  CONVERT(date,[utl_recycle_date] ) as RecycleDate
  FROM XYZ
  WHERE account_number = '6900' AND match_status = 'F' 
  AND [utl_recycle_date] IS NOT NULL
  AND [utl_recycle_date] > '11/01/2018'
  GROUP BY DATEDIFF(DAY, CONVERT(date,[utl_recycle_date] ), CONVERT(date, GETDATE())),CONVERT(date,[utl_recycle_date] )
  ORDER BY 1

DECLARE @RecycleDate datetime 
DECLARE @NewDate datetime 

OPEN db_cursor 

FETCH next FROM db_cursor INTO @RecycleDate 

WHILE @@FETCH_STATUS = 0 
  BEGIN 

      FETCH next FROM db_cursor INTO @NewDate

      insert INTO #table (olddate, newdate) values (cast(@RecycleDate as date), cast(@NewDate as date))
      set @RecycleDate = @NewDate

  END 

CLOSE db_cursor 

DEALLOCATE db_cursor 

select 
olddate, newdate,
CASE 
  WHEN DATEDIFF(DAY, olddate, newdate) = 0 THEN 1 
  WHEN DATEDIFF(DAY, olddate, newdate) > 0 THEN DATEDIFF(DAY, olddate, newdate)
  END AS RecyclerFrequency  

FROM #table

drop table #table
4

1 回答 1

0 
--- Query to get date difference between two rows 

declare @table table (olddate datetime, newdate datetime)
create table #table (olddate datetime, newdate datetime)

DECLARE db_cursor CURSOR FOR 

  SELECT  CONVERT(date,[utl_recycle_date] ) as RecycleDate
  FROM XYZ
  WHERE account_number = '6900' AND match_status = 'F' 
  AND [utl_recycle_date] IS NOT NULL
  AND [utl_recycle_date] > '11/01/2018'
  GROUP BY DATEDIFF(DAY, CONVERT(date,[utl_recycle_date] ), CONVERT(date, GETDATE())),CONVERT(date,[utl_recycle_date] )
  ORDER BY 1

DECLARE @RecycleDate datetime 
DECLARE @NewDate datetime 

OPEN db_cursor 

FETCH next FROM db_cursor INTO @RecycleDate 

WHILE @@FETCH_STATUS = 0 
  BEGIN 

      FETCH next FROM db_cursor INTO @NewDate

      insert INTO #table (olddate, newdate) values (cast(@RecycleDate as date), cast(@NewDate as date))
      set @RecycleDate = @NewDate

  END 

CLOSE db_cursor 

DEALLOCATE db_cursor 

select 
olddate, newdate,
CASE 
  WHEN DATEDIFF(DAY, olddate, newdate) = 0 THEN 1 
  WHEN DATEDIFF(DAY, olddate, newdate) > 0 THEN DATEDIFF(DAY, olddate, newdate)
  END AS RecyclerFrequency  

FROM #table

drop table #table
于 2018-12-10T22:24:20.557 回答