Table.AddJoinColumn

Table.AddJoinColumn(table1 as table, key1 as any, table2 as function, key2 as any, newColumnName as text) as table

根据由 key1 (针对 table1)和 key2 (针对 table2)选择的键列的值是否相等，联接 table1 的行与 table2 的行。将结果输入到名为 newColumnName 的列。 此函数的行为类似于具有 JoinKind 的 LeftOuter 的 Table.Join，除了联接结果以嵌套而非平展方式存在之外。

示例:

从已联接 [saleID] 的表({[saleID = 1, price = 20], [saleID = 2, price = 10]})将名为 "price/stock" 的联接列添加到({[saleID = 1, item = "Shirt"], [saleID = 2, item = "Hat"]})。

使用情况:

Table.AddJoinColumn(Table.FromRecords({[saleID = 1, item = "Shirt"], [saleID = 2, item = "Hat"]}), "saleID", () => Table.FromRecords({[saleID = 1, price = 20, stock = 1234], [saleID = 2, price = 10, stock = 5643]}), "saleID", "price")

输出:

Table.FromRecords({ [
    saleID = 1,
    item = "Shirt",
    price =Table.FromRecords({ [
            saleID = 1,
            price = 20,
            stock = 1234
        ]
    }, {
        "saleID",
        "price",
        "stock"
    })
], [
    saleID = 2,
    item = "Hat",
    price =Table.FromRecords({ [
            saleID = 2,
            price = 10,
            stock = 5643
        ]
    }, {
        "saleID",
        "price",
        "stock"
    })
]
}, {
"saleID",
"item",
"price"
})