嘗試在Excel Power Query SelectRows行中使用變量作爲字段名稱時出錯

我有以下Excel 2016 Power Query（獲取&變換查詢）。它工作正常，但我想使用的字段名變量在兩個SelectRows線：嘗試在Excel Power Query SelectRows行中使用變量作爲字段名稱時出錯

let 

    //Variables: 
     //Server Name: 
      DefnameServerName = Excel.CurrentWorkbook(){[Name="IMPORT_SERVER_NAME"]}[Content], 
      ServerName = DefnameServerName{0}[Column1], 
     //Database Name: 
      DefnameDatabaseName = Excel.CurrentWorkbook(){[Name="IMPORT_DATABASE_NAME"]}[Content], 
      DatabaseName = DefnameDatabaseName{0}[Column1], 
     //Schema Name: 
      DefnameSchemaName = Excel.CurrentWorkbook(){[Name="IMPORT_SCHEMA_NAME"]}[Content], 
      SchemaName = DefnameSchemaName{0}[Column1], 
     //Table Name: 
      DefnameTableName = Excel.CurrentWorkbook(){[Name="IMPORT_TABLE_NAME"]}[Content], 
      TableName = DefnameTableName{0}[Column1], 
     //ID Field Name: 
      DefnameFieldNameID = Excel.CurrentWorkbook(){[Name="IMPORT_FIELDNAME_ID"]}[Content], 
      FieldNameID = DefnameFieldNameID{0}[Column1], 
     //Customer Field Name: 
      DefnameFieldNameCustomer = Excel.CurrentWorkbook(){[Name="IMPORT_FIELDNAME_CUSTOMER"]}[Content], 
      FieldNameCustomer = DefnameFieldNameCustomer{0}[Column1], 
     //Region Field Name: 
      DefnameFieldNameRegion = Excel.CurrentWorkbook(){[Name="IMPORT_FIELDNAME_REGION"]}[Content], 
      FieldNameRegion = DefnameFieldNameRegion{0}[Column1], 
     //Month Field Name: 
      DefnameFieldNameMonth = Excel.CurrentWorkbook(){[Name="IMPORT_FIELDNAME_MONTH"]}[Content], 
      FieldNameMonth = DefnameFieldNameMonth{0}[Column1], 
     //Forecast Value Field Name: 
      DefnameFieldNameForecastValue = Excel.CurrentWorkbook(){[Name="IMPORT_FIELDNAME_FORECAST_VALUE"]}[Content], 
      FieldNameForecastValue = DefnameFieldNameForecastValue{0}[Column1], 

    //Parameters: 
     //ID: 
      DefnameParameterID = Excel.CurrentWorkbook(){[Name="IMPORT_PARAMETER_ID"]}[Content], 
      ParameterID = DefnameParameterID{0}[Column1], 
     //Customer: 
      DefnameParameterCustomer = Excel.CurrentWorkbook(){[Name="IMPORT_PARAMETER_CUSTOMER"]}[Content], 
      ParameterCustomer = DefnameParameterCustomer{0}[Column1], 

    Source = Sql.Database(ServerName, DatabaseName), 
    dbo_MidtermOmnibusForecast = Source{[Schema=SchemaName,Item=TableName]}[Data], 
    RemoveOtherColumns = Table.SelectColumns(dbo_MidtermOmnibusForecast,{FieldNameID, FieldNameCustomer, FieldNameMonth, FieldNameForecastValue, FieldNameRegion}), 
    FilterByUUID = Table.SelectRows(RemoveOtherColumns, each ([UUID] = ParameterID)), 
    FilterByCustomer = Table.SelectRows(FilterByUUID, each ([ForecastName] = ParameterCustomer)), 
    PivotMonths = Table.Pivot(Table.TransformColumnTypes(FilterByCustomer, {{FieldNameMonth, type text}}, "en-US"), List.Distinct(Table.TransformColumnTypes(FilterByCustomer, {{FieldNameMonth, type text}}, "en-US")[ForecastDate]), FieldNameMonth, FieldNameForecastValue, List.Sum), 
    SortByCustomerThenRegion = Table.Sort(PivotMonths,{{FieldNameCustomer, Order.Ascending}, {FieldNameRegion, Order.Ascending}}) 
in 
    SortByCustomerThenRegion

我已經試過這樣：

FilterByUUID = Table.SelectRows(RemoveOtherColumns, each ([FieldNameID] = ParameterID)), 
    FilterByCustomer = Table.SelectRows(FilterByUUID, each ([FieldNameCustomer] = ParameterCustomer)),

我已經試過這樣：

FilterByUUID = Table.SelectRows(RemoveOtherColumns, each (FieldNameID = ParameterID)), 
    FilterByCustomer = Table.SelectRows(FilterByUUID, each (FieldNameCustomer = ParameterCustomer)),

但他們都打破查詢。我需要做什麼才能在兩個SelectRows行中使用字段名稱的變量？

來源

2017-06-28 Greg Lovern

的答案在https://social.technet.microsoft.com/Forums/en-US/13df0744-4f27-4f3a-8565-7e24b1d73c17/error-trying-to-use-variable-for-the-field-name-in-a-selectrows-line?forum=powerquery提供：

不能使用方括號可變字段名稱，但必須使用Record.Field，而不是像這樣：

FilterByUUID = Table.SelectRows(RemoveOtherColumns, each (Record.Field(_, FieldNameID) = ParameterID)),

（這是隻需要其中方括號在字段名稱周圍使用，因爲它們在SelectRows行中，在沒有方括號的地方，就像我上面代碼中的SelectColumns行一樣，你可以象我一樣交換變量名--Greg）

來源

2017-06-29 18:04:37

嘗試在Excel Power Query SelectRows行中使用變量作爲字段名稱時出錯

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