Table.Join
Соединяет строки из двух таблиц, которые согласуются по заданным ключам.
Syntax
Table.Join(
table1 as table,
key1 as any,
table2 as table,
key2 as any,
optional joinKind as JoinKind.Type,
optional joinAlgorithm as JoinAlgorithm.Type,
optional keyEqualityComparers as list
) as table
Remarks
Соединяет строки таблицы table1
со строками таблицы table2
с учетом тождественности значений ключевых столбцов, выбранных в key1
(для table1
) и в key2
(для table2
).
По умолчанию вы полняется внутреннее соединение, но можно включить необязательный параметр joinKind
для указания типа соединения. Возможны следующие значения.
JoinKind.Inner
JoinKind.LeftOuter
JoinKind.RightOuter
JoinKind.FullOuter
JoinKind.LeftAnti
JoinKind.RightAnti
Необязательный набор
keyEqualityComparers
может быть включен для указания способа сравнения ключевых столбцов. Сейчас этот параметр предназначен только для внутреннего использования.Examples
Example #1
Объедините две таблицы с помощью одного ключевого столбца.
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"
)
Result:
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]
})
Example #2
Объединение двух таблиц с конфликтующими именами столбцов с использованием нескольких ключевых столбцов.
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"}
)
Result:
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]
})
Category
Table.Transformation