Table.Join
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
Unisce le righe di table1
alle righe di table2
in base all'uguaglianza dei valori delle colonne chiave selezionate da key1
(per table1
) e key2
(per table2
).
Per impostazione predefinita viene eseguito un inner join, ma è possibile includere il parametro joinKind
facoltativo per specificare il tipo di join. Le opzioni includono:
- JoinKind.Inner
- JoinKind.LeftOuter
- JoinKind.RightOuter
- JoinKind.FullOuter
- JoinKind.LeftAnti
- JoinKind.RightAnti
- JoinKind.LeftSemi
- JoinKind.RightSemi
È possibile includere un set facoltativo di keyEqualityComparers
per specificare la modalità di confronto delle colonne chiave. Il parametro è attualmente destinato solo all'uso interno.
Unire due tabelle usando una singola colonna chiave.
Utilizzo
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]
})
Unire due tabelle con nomi colonna in conflitto usando più colonne chiave.
Utilizzo
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]
})