数据透视列中的行重复

Question

AccountTitle     ReportMonth     Amount     
--------------------------------------------
Visa            January          3320.00
Medical         January          1635.82     
Commission      January          2200.00    
Staff Allowance January          1215.00    
Commission      January          2200.00    
Medical         February         1636.00    
Commission      February         2200.00        
Staff Allowance March            1750.00

使用这个查询

select AccountTitle, [January], [February], [March] 
 [dbo].MyReport 
pivot
(
sum(amount)
    for [ReportMonth] in (January, February, March)
) as P


accounttile      January  February   March
-----------------------------------------------------------
Visa             3320     null       null
Medical          1635     null       null
Commission       4400     null       null
Staff Allowance  1215     null       null   
Medical          null     1636.00    null
Commission       null     2200.00    null
Staff Allowance  null     null       1750.00

现在你可以看到medical, commission, staff allowance是重复的。因为二月来不及

想要的结果是

accounttile              January    February    March
-----------------------------------------------------------
Visa                     3320       null        null
Medical                  1635       1636.00     null
Commission               4400       2200.00     null
Staff Allowance          1215       null        1750.00

Answer 1

您的示例中显示的列可能更多

LiveDemo1

使用子查询只获取AccountTitle, ReportMonth, amount:

SELECT AccountTitle, [January], [February], [March] 
FROM (SELECT AccountTitle, ReportMonth, amount FROM MyReport) AS s
PIVOT ( 
  SUM(amount) for [ReportMonth] in (January, February, March) 
) AS pvt

LiveDemo2

输出：

╔═════════════════╦═════════╦══════════╦═══════╗
║   AccountType   ║ January ║ February ║ March ║
╠═════════════════╬═════════╬══════════╬═══════╣
║ Commission      ║ 4400    ║     2200 ║       ║
║ Medical         ║ 1635.82 ║     1636 ║       ║
║ Staff Allowance ║ 1215    ║          ║  1750 ║
║ Visa            ║ 3320    ║          ║       ║
╚═════════════════╩═════════╩══════════╩═══════╝

数据透视列中的行重复

Rows are duplicating in Pivot column

sql

tsql

sql-server

pivot