英文:
How to combine multiple sources during the creation of a query?
问题
我想创建一个查询，它可以同时加载多个数据源，格式化它们，然后将它们合并。
我使用管道操作符 ' |> ' 来格式化这些数据源，以简化整个过程。
let
Source1 = Json.Document(Web.Contents(...))
|> Table.FromRecords
|> Table.RemoveColumns({"...", "..."})
|> Table.ExpandListColumn(...)
|> Table.ExpandRecordColumn("...", {"...", "...", "..."});
Source2 = Json.Document(Web.Contents(...))
|> Table.FromRecords
|> Table.RemoveColumns({"...", "..."})
|> Table.ExpandListColumn(...)
|> Table.ExpandRecordColumn("...", {"...", "...", "..."});
Combined = Table.Combine({Source1, Source2})
in
Combined
Power Query 告诉我在第一个管道操作符 ' | ' 的前面缺少逗号。如果我添加逗号，它会说缺少标识符。
我可以创建多个请求然后将它们合并，但我想避免这样做，因为我的工作站非常慢，这样做会使它变得更加缓慢，因为有太多的依赖关系。
英文:
I want to create a query in which it loads multiple sources at a time, formats them and then combines them.
I used pipeline operators '|>' to format the sources and to simplify the process.
let
Source1 = Json.Document(Web.Contents(...))
|> Table.FromRecords
|> Table.RemoveColumns({"...", "..."})
|> Table.ExpandListColumn(...)
|> Table.ExpandRecordColumn("...", {"...", "...", "..."});
Source2 = Json.Document(Web.Contents(...))
|> Table.FromRecords
|> Table.RemoveColumns({"...", "..."})
|> Table.ExpandListColumn(...)
|> Table.ExpandRecordColumn("...", {"...", "...", "..."});
Combined = Table.Combine({Source1, Source2})
in
Combined
Power Query tells me that a comma is missing at the first '|' of the first operator. If I add one, it says that an Identifier is missing.
I can create multiple requests and then combine them, but I want to avoid this because my workstation is very slow and it will slow it down even more because of all the dependencies.
答案1
得分: 1
编辑：Power Query 不支持此表示法。您需要使用标准查询语法：
let
Source1 = Json.Document(Web.Contents(...)),
s11 = Table.FromRecords(Source1),
s12 = Table.RemoveColumns(s11, {"...", "..."}),
s13 = Table.ExpandListColumn(s12, ...),
Source1T = Table.ExpandRecordColumn(s13, "...", {"...", "...", "..."}),
Source2 = Json.Document(Web.Contents(...)),
s21 = Table.FromRecords(Source2),
s22 = Table.RemoveColumns(s21, {"...", "..."}),
s23 = Table.ExpandListColumn(s22, ...),
Source2T = Table.ExpandRecordColumn(s23, "...", {"...", "...", "..."}),
Combined = Table.Combine({Source1T, Source2T})
in
Combined
或者我认为类似这样的内容也可以工作：
let
Source1 =
let
s10 = Json.Document(Web.Contents(...)),
s11 = Table.FromRecords(s10),
s12 = Table.RemoveColumns(s11, {"...", "..."}),
s13 = Table.ExpandListColumn(s12, ...)
in
Table.ExpandRecordColumn(s13, "...", {"...", "...", "..."}),
Source2 =
let
s20 = Json.Document(Web.Contents(...)),
s21 = Table.FromRecords(s20),
s22 = Table.RemoveColumns(s21, {"...", "..."}),
s23 = Table.ExpandListColumn(s22, ...)
in
Table.ExpandRecordColumn(s23, "...", {"...", "...", "..."}),
Combined = Table.Combine({Source1, Source2})
in
Combined
英文:
Edit: This notation is not supported by Power Query. You will need to use standard query syntax:
let
Source1 = Json.Document(Web.Contents(...)),
s11 = Table.FromRecords(Source1),
s12 = Table.RemoveColumns(s11, {"...", "..."}),
s13 = Table.ExpandListColumn(s12, ...),
Source1T = Table.ExpandRecordColumn(s13, "...", {"...", "...", "..."}),
Source2 = Json.Document(Web.Contents(...)),
s21 = Table.FromRecords(Source2),
s22 = Table.RemoveColumns(s21, {"...", "..."}),
s23 = Table.ExpandListColumn(s22, ...),
Source2T = Table.ExpandRecordColumn(s23, "...", {"...", "...", "..."}),
Combined = Table.Combine({Source1T, Source2T})
in
Combined
or I suppose something like this would also work:
let
Source1 =
let
s10 = Json.Document(Web.Contents(...)),
s11 = Table.FromRecords(Source1),
s12 = Table.RemoveColumns(s11, {"...", "..."}),
s13 = Table.ExpandListColumn(s12, ...)
in
Table.ExpandRecordColumn(s13, "...", {"...", "...", "..."}),
Source2 =
let
s20 = Json.Document(Web.Contents(...)),
s21 = Table.FromRecords(Source2),
s22 = Table.RemoveColumns(s21, {"...", "..."}),
s23 = Table.ExpandListColumn(s22, ...)
in
Table.ExpandRecordColumn(s23, "...", {"...", "...", "..."}),
Combined = Table.Combine({Source1T, Source2T})
in
Combined
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