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Table.NestedJoin

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Syntax

Table.NestedJoin(table1 as table, key1 as any, table2 as any, key2 as any, newColumnName as text, optional joinKind as nullable number, optional keyEqualityComparers as nullable list) as table

About

Joins the rows of table1 with the rows of table2 based on the equality of the values of the key columns selected by key1 (for table1) and key2 (for table2). The results are entered into the column named newColumnName.

The optional joinKind specifies the kind of join to perform. By default, a left outer join is performed if a joinKind is not specified.

An optional set of keyEqualityComparers may be included to specify how to compare the key columns. This keyEqualityComparers feature is currently intended for internal use only.

Example 1

Join two tables using a single key column.

Usage

Table.NestedJoin(
    Table.FromRecords({
        [CustomerToCall = 1],
        [CustomerToCall = 3]
    }),
    {"CustomerToCall"},
    Table.FromRecords({
        [CustomerID = 1, Name = "Bob", Phone = "123-4567"],
        [CustomerID = 2, Name = "Jim", Phone = "987-6543"],
        [CustomerID = 3, Name = "Paul", Phone = "543-7890"],
        [CustomerID = 4, Name = "Ringo", Phone = "232-1550"]
    }),
    {"CustomerID"},
    "CustomerDetails"
)

Output

Table.FromRecords({
    [CustomerToCall = 1, CustomerDetails = Table.FromRecords({[CustomerID = 1, Name = "Bob", Phone = "123-4567"]})],
    [CustomerToCall = 3, CustomerDetails = Table.FromRecords({[CustomerID = 3, Name = "Paul", Phone = "543-7890"]})]
})