excel - 上电查询Error.Record

Question

如何吐出记录，以错误记录的形式显示在工作簿查询 Pane 中？

例如，如果[AcctClass] <> [_checkAcctClass]列不匹配，则将该记录拒绝为错误

let 
    source = AccountIDsWithDuplicates,
    grouped = Table.Group(source, {"AcctID"}, {{"AcctClass", each List.Max([AcctClass]), type logical}, {"_checkAcctClass", each List.Min([AcctClass]), type logical}, {"Sum_Bal", each List.Sum([#"Bal_EUR"]), type number}}),
    // Make sure accounts only have one AcctClass 
    ErrorRecords = Table.SelectRows(grouped,  each([AcctClass] <> [_checkAcctClass])
in
    grouped

Answer 1

组合Table.TransformRows来创建错误，然后将它们重新放入Table.FromRecords的表中可能会做您想要的？

= Table.FromRecords(Table.TransformRows(grouped, each if [AcctClass] <> [_checkAcctClass] then error "didn't match" else _), Value.Type(grouped))

如果第一行有错误，则Table.FromRecords将完全中断，但是您可以通过告诉它期望的表类型来解决此问题。

混搭示例:

let
    Source = Csv.Document("AcctID,AcctClass
        1,false
        1,true
        2,true
        2,true"),
    #"Promoted Headers" = Table.PromoteHeaders(Source),
    AccountIDsWithDuplicates = Table.TransformColumnTypes(#"Promoted Headers",{{"AcctID", Int64.Type}, {"AcctClass", type logical}}),
    grouped = Table.Group(AccountIDsWithDuplicates, {"AcctID"}, {{"AcctClass", each List.Max([AcctClass]), type logical}, {"_checkAcctClass", each List.Min([AcctClass]), type logical}}),
    ErrorRecords = Table.FromRecords(Table.TransformRows(grouped,  each if [AcctClass] <> [_checkAcctClass] then error "didn't match" else _), Value.Type(grouped))
in
    ErrorRecords