在PowerQuery / M中插入带有值列表的新列

Question

如果我有以下来源：

#"My Source" = Table.FromRecords({
        [Name="Jared Smith", Age=24],
        [Name = "Tom Brady", Age=44],
        [Name="Hello Tom", Age = null],
        [Name = "asdf", Age = "abc"]
    }),

例如，如何从值列表中添加新列：

Table.AddColumn(#"My Source", "New Col", {'x', 'y', 'z', null})

现在我的表将有三列。如何做到这一点？

Answer 1

我是PQ初学者，所以可能会有更有效的方法，但这是一个：

• 向每个表添加索引列
• 使用索引列作为关键字合并两个表
• 删除索引列

---

let
    Source1 = Table.FromRecords({
        [Name="Jared Smith", Age=24],
        [Name = "Tom Brady", Age=44],
        [Name="Hello Tom", Age = null],
        [Name = "asdf", Age = "abc"]
    }),
    #"Added Index" = Table.AddIndexColumn(Source1, "Index", 0, 1),
    Source2 = Table.FromRecords({
        [New="x"],
        [New = "y"],
        [New = "z"],
        [New = null]
    }),
    #"Added Index2" = Table.AddIndexColumn(Source2, "Index", 0, 1),
    Merge = Table.Join(#"Added Index", "Index",#"Added Index2", "Index"),
    #"Removed Columns" = Table.RemoveColumns(Merge,{"Index"})
in
    #"Removed Columns"