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Table.Join

Syntaks

Table.Join(
    table1 as table,
    key1 as any,
    table2 as table,
    key2 as any,
    optional joinKind as nullable number,
    optional joinAlgorithm as nullable number,
    optional keyEqualityComparers as nullable list
) as table

Omtrent

Joinforbinder rækkerne i table1 med rækkerne i table2 baseret på ligheden mellem værdierne i de nøglekolonner, der er valgt af key1 (for table1) og key2 (for table2).

Der udføres som standard en indre joinforbindelse, men en valgfri joinKind kan inkluderes for at angive jointypen. Indstillingerne omfatter:

Der kan inkluderes et valgfrit sæt keyEqualityComparers for at angive, hvordan nøglekolonnerne skal sammenlignes. Denne parameter er i øjeblikket kun beregnet til intern brug.

Eksempel 1

Joinforbind to tabeller ved hjælp af en enkelt nøglekolonne.

brug

Table.Join(
    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",
    Table.FromRecords({
        [OrderID = 1, CustomerID = 1, Item = "Fishing rod", Price = 100.0],
        [OrderID = 2, CustomerID = 1, Item = "1 lb. worms", Price = 5.0],
        [OrderID = 3, CustomerID = 2, Item = "Fishing net", Price = 25.0],
        [OrderID = 4, CustomerID = 3, Item = "Fish tazer", Price = 200.0],
        [OrderID = 5, CustomerID = 3, Item = "Bandaids", Price = 2.0],
        [OrderID = 6, CustomerID = 1, Item = "Tackle box", Price = 20.0],
        [OrderID = 7, CustomerID = 5, Item = "Bait", Price = 3.25]
    }),
    "CustomerID"
)

output

Table.FromRecords({
    [CustomerID = 1, Name = "Bob", Phone = "123-4567", OrderID = 1, Item = "Fishing rod", Price = 100],
    [CustomerID = 1, Name = "Bob", Phone = "123-4567", OrderID = 2, Item = "1 lb. worms", Price = 5],
    [CustomerID = 2, Name = "Jim", Phone = "987-6543", OrderID = 3, Item = "Fishing net", Price = 25],
    [CustomerID = 3, Name = "Paul", Phone = "543-7890", OrderID = 4, Item = "Fish tazer", Price = 200],
    [CustomerID = 3, Name = "Paul", Phone = "543-7890", OrderID = 5, Item = "Bandaids", Price = 2],
    [CustomerID = 1, Name = "Bob", Phone = "123-4567", OrderID = 6, Item = "Tackle box", Price = 20]
})

Eksempel 2

Joinforbind to tabeller, der har modstridende kolonnenavne, ved hjælp af flere nøglekolonner.

brug

let
    customers = Table.FromRecords({
        [TenantID = 1, CustomerID = 1, Name = "Bob", Phone = "123-4567"],
        [TenantID = 1, CustomerID = 2, Name = "Jim", Phone = "987-6543"]
    }),
    orders = Table.FromRecords({
        [TenantID = 1, OrderID = 1, CustomerID = 1, Name = "Fishing rod", Price = 100.0],
        [TenantID = 1, OrderID = 2, CustomerID = 1, Name = "1 lb. worms", Price = 5.0],
        [TenantID = 1, OrderID = 3, CustomerID = 2, Name = "Fishing net", Price = 25.0]
    })
in
    Table.Join(
        customers,
        {"TenantID", "CustomerID"},
        Table.PrefixColumns(orders, "Order"),
        {"Order.TenantID", "Order.CustomerID"}
    )

Table.FromRecords({
    [TenantID = 1, CustomerID = 1, Name = "Bob", Phone = "123-4567", Order.TenantID = 1, Order.OrderID = 1, Order.CustomerID = 1, Order.Name = "Fishing rod", Order.Price = 100],
    [TenantID = 1, CustomerID = 1, Name = "Bob", Phone = "123-4567", Order.TenantID = 1, Order.OrderID = 2, Order.CustomerID = 1, Order.Name = "1 lb. worms", Order.Price = 5],
    [TenantID = 1, CustomerID = 2, Name = "Jim", Phone = "987-6543", Order.TenantID = 1, Order.OrderID = 3, Order.CustomerID = 2, Order.Name = "Fishing net", Order.Price = 25]
})
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