无法使用在左联接中使用交叉应用创建的临时列 SQL

Question

我使用交叉应用将数据从宽格式翻转为高格式。使用以下问题的答案来实施 Using PIVOT to Flip Data from Wide to Tall

我已经创建了临时列Sector。我想将此列用于与另一个 table 的 Left Join。但是我在这一行 V.Sector = S.[Sector name]

上收到错误 Invalid column name 'Sector'

SELECT Date,
      Country,
      Sector,
      PE,
      PX_BOOK
      S.Sector_level
FROM [Economic_Data].[dbo].[Sector_Valuations] V
CROSS APPLY 
(
  VALUES
    ('Large Cap Equity',[Large Cap Equity_PE],[Large Cap Equity_book]),
    ('Mid Cap Equity',[Mid Cap Equity_PE],[Mid Cap Equity_book]),
    ('Small Cap Equity',[Small Cap Equity_PE],[Small Cap Equity_book]),
    ('Value Index',[Value Index_PE],[Value Index_book]),
    ('Growth Index',[Growth Index_PE],[Growth Index_book]),
    )  x (Sector, PE, PX_BOOK)  
 Left join [Economic_Data].[dbo].[Sector level] S
 on  V.Sector = S.[Sector name]

谁能帮我解决这个问题。谢谢！

Answer 1

您需要参考 cross apply 别名：

[Economic_Data].[dbo].[Sector level] S
on V.Sector = x.[Sector name] 
--------------^

Answer 2

您似乎需要删除最后一个逗号。

SELECT Date,
      Country,
      Sector,
      PE,
      PX_BOOK
      S.Sector_level
FROM [Economic_Data].[dbo].[Sector_Valuations] V
CROSS APPLY 
(
  VALUES
    ('Large Cap Equity',[Large Cap Equity_PE],[Large Cap Equity_book]),
    ('Mid Cap Equity',[Mid Cap Equity_PE],[Mid Cap Equity_book]),
    ('Small Cap Equity',[Small Cap Equity_PE],[Small Cap Equity_book]),
    ('Value Index',[Value Index_PE],[Value Index_book]),
    ('Growth Index',[Growth Index_PE],[Growth Index_book])--, <------
    )  x (Sector, PE, PX_BOOK)  
 Left join [Economic_Data].[dbo].[Sector level] S
 on  V.Sector = S.[Sector name]

无法使用在左联接中使用交叉应用创建的临时列 SQL

Not able to use temporary column created using Cross apply in Left Join SQL

sql

sql-server

join

cross-apply