Select 行基于变量列名称

Select rows based on variable column name

这个好像不难，但是我就堆到这里了。我想通过变量名引用 table 列进行过滤，但不明白为什么这不起作用。

let
    Source = Table.FromRecords({
    [VarColumn = "Val",  Phone = "123-4567"],
    [VarColumn = "Val2",  Phone = "987-6543"],
    [VarColumn = "NA",  Phone = "543-7890"],
    [VarColumn = "OTHER",  Phone = "543-7890"]
    }),

    VariableColumn = "VarColumn",
    filter = Table.SelectRows(Source, each (Table.Column(Source, VariableColumn) = "OTHER"))
in
    filter

尝试

    filter = Table.SelectRows(Source, each Record.Field(_, VariableColumn) = "OTHER")