Powerbi Table.ExpandTableColumn仅限第一行

我想使用Power Query使用

table.ExpandTableColumn.

提取相关表，而不是展开整个相关表，我只想展开第一行

在下面的尝试中，我提取了整个“Name”列

= Table.ExpandTableColumn(#"Changed Type", "ToRecipients", {"Name"}, {"ToRecipients.Name"})

有什么想法吗

---

保罗

这是怎么回事

Table.ExpandTableColumn(

    // Retaining only first rows in the nested tables
    Table.TransformColumns(#"Changed Type", {"Name", each Table.FirstN(_, 1)}),

    "ToRecipients", {"Name"}, {"ToRecipients.Name"}
)

或者

Table.ExpandRecordColumn(

    // Retaining only first rows in the nested tables as 'records'
    Table.TransformColumns(#"Changed Type", {"Name", Table.First}),

    "ToRecipients", {"Name"}, {"ToRecipients.Name"}
)

---

两者的作用完全相同。以后可能会看起来更简单一点？

它是如何工作的

Table.ExpandTableColumn(

    // Retaining only first rows in the nested tables
    Table.TransformColumns(#"Changed Type", {"Name", each Table.FirstN(_, 1)}),

    "ToRecipients", {"Name"}, {"ToRecipients.Name"}
)

或者

Table.ExpandRecordColumn(

    // Retaining only first rows in the nested tables as 'records'
    Table.TransformColumns(#"Changed Type", {"Name", Table.First}),

    "ToRecipients", {"Name"}, {"ToRecipients.Name"}
)

---

两者的作用完全相同。后来一个人可能看起来简单了一点？

我猜应该是这样的

= Table.ExpandTableColumn( Table.TransformColumns(
                      #"Changed Type", {"ToRecipients", each Table.FirstN(_, 1)}),

"ToRecipients", {"Name"}, {"ToRecipients.Name"})

---

我猜应该是这样的

= Table.ExpandTableColumn( Table.TransformColumns(
                      #"Changed Type", {"ToRecipients", each Table.FirstN(_, 1)}),

"ToRecipients", {"Name"}, {"ToRecipients.Name"})