Question

我们有SQL Server 2016.多年来我们有自己的历史。现在我想将历史数据转换为新格式，并将CustomAudit表用作具有已有历史数据的历史表。

首先会有一个小例子，然后是问题

CREATE TABLE [dbo].[client]
(
     idclient int identity(1,1) primary key, 
     clientData nvarchar (400)
) ON [PRIMARY] 

INSERT [dbo].[client] ( clientData ) values ('some-12221')
INSERT [dbo].[client] ( clientData ) values ('some-22111')

alter table [client] 
add 
    StartTime datetime2 GENERATED ALWAYS AS ROW START  DEFAULT GETUTCDATE(), 
    EndTime datetime2 GENERATED ALWAYS AS ROW END DEFAULT CONVERT(DATETIME2, '9999-12-31 23:59:59.9999999'), 
    PERIOD FOR SYSTEM_TIME (StartTime,EndTime) 

CREATE TABLE [dbo].[CustomAydit_client]
(
    idclient int,
    dEditDate datetime NOT NULL DEFAULT (getdate()), 
    clientData nvarchar (400)
) ON [PRIMARY] 

alter table [CustomAydit_client] 
add 
    StartTime datetime2 GENERATED ALWAYS AS ROW START  DEFAULT GETUTCDATE(), 
    EndTime datetime2 GENERATED ALWAYS AS ROW END DEFAULT CONVERT(DATETIME2, '9999-12-31 23:59:59.9999999'), 
    PERIOD FOR SYSTEM_TIME (StartTime,EndTime)

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (1, (CAST(N'2016-05-06 10:08:11.923' AS DateTime)), 'some-1')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (1, (CAST(N'2016-02-11 10:08:11.923' AS DateTime)), 'some-211')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (2, (CAST(N'2016-12-06 10:08:11.923' AS DateTime)), 'some-1')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (1, (CAST(N'2015-05-19 10:08:11.923' AS DateTime)), 'some-1')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (2, (CAST(N'2016-05-06 10:08:11.923' AS DateTime)), 'some-211')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData)
VALUES (1, (CAST(N'2016-05-26 10:08:11.923' AS DateTime)), 'some-1')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (2, (CAST(N'2016-05-06 10:08:11.923' AS DateTime)), 'some33-1')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (1, (CAST(N'2016-05-06 10:08:11.923' AS DateTime)), 'some3-1')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate,clientData) 
VALUES (2, (CAST(N'2016-11-16 10:08:11.923' AS DateTime)), 'some-1')

INSERT [dbo].[CustomAydit_client] (idclient, dEditDate, clientData) 
VALUES (1, (CAST(N'2016-02-17 10:08:11.923' AS DateTime)), 'some-1')

我需要行和行的StartTime。

对于客户1，我想获取字段DeditDate的第2行数据

更新此数据第1行字段EndTime

最后一行，客户端不应该有EndTime，这个确定9999-12-31 23：59：59.9999999

SELECT
    ROW_NUMBER() OVER( PARTITION BY idclient ORDER BY dEditDate) AS tempid,
    idclient,
    dEditDate,
    StartTime, EndTime
FROM
    [dbo].[CustomAydit_client]
ORDER BY
    idclient, dEditDate

Answer 1

您可以使用lead函数从下一行获取值作为结束时间。

select 
    ROW_NUMBER() OVER(PARTITION BY idclient ORDER BY dEditDate) AS tempid,
    idclient,
    dEditDate,
    StartTime,
    lead(dEditDate) over(PARTITION BY idclient ORDER BY dEditDate) as EndTime
from [dbo].[CustomAydit_client]
order by idclient, dEditDate

SQL Server：将历史数据转换为时态表

1 个答案: