Sql server 如何在SQL Server中将两列显示为行？

在SQL Server中将两列转换为行

通过简单交叉应用

DECLARE @Table1  TABLE 
    (ID int,installdate varchar(20),uninstalldate varchar(20))
;

INSERT INTO @Table1
    (ID,installdate,uninstalldate)
VALUES
    (1,'15/06/2016','18/06/2016'),
    (2,'20/06/2016','25/06/2016')

脚本：

 select COL AS [Instal OR Uninstall],VAL AS [Date] from @Table1
        CROSS APPLY
    (VALUES 
    ('installdate',installdate),
    ('uninstalldate',installdate))
    CS(COL,VAL)

简单应该做的事情：

SELECT  [DATES], 
        [VALUES]
FROM MyTable
UNPIVOT (
    [VALUES] FOR [DATES] IN (InstallDate,UnInstallDate)
) as unpvt

输出：

DATES           VALUES
InstallDate     2016-06-15
UnInstallDate   2016-06-18
InstallDate     2016-06-20
UnInstallDate   2016-06-25

---

您可以

UNPIVOT

将列拆分为行：

DECLARE @Data TABLE (
    Id INT,
    InstallDate DATE,
    UnInstallDate DATE
)
INSERT @Data VALUES (1,'6/15/2016', '6/18/2016'),(2,'6/20/2016', '6/25/2016')

SELECT
    ActivityType,
    ActivityDate
FROM @Data 
    UNPIVOT (ActivityDate FOR ActivityType IN (InstallDate, UnInstallDate)) T

这将生成以下行：

ActivityType              ActivityDate
------------------------- ------------
InstallDate               2016-06-15
UnInstallDate             2016-06-18
InstallDate               2016-06-20
UnInstallDate             2016-06-25

---

欢迎来到stackoverflow。请阅读。只需使用Pivot将行转换为列即可。这可能是我的荣幸的副本！如果答案有帮助，请随意投票/接受：）这是表示感谢的最佳方式：）