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partitionBy divides a single table into subtables.
| Parameter | Type | Description |
|---|---|---|
| keyColumnNames | String... | The column(s) by which to group data. |
| dropKeys | boolean | Whether to drop key columns in the output constituent tables. |
A PartitionedTable containing a subtable for each group.
table.partitionBy(dropKeys, keyColumnNames...)
table.partitionBy(keyColumnNames...)
source = newTable(
stringCol("X", "A", "B", "A", "C", "B", "A", "B", "B", "C"),
stringCol("Y", "M", "N", "O", "N", "P", "M", "O", "P", "M"),
intCol("Number", 55, 76, 20, 130, 230, 50, 73, 137, 214),
)
result = source.partitionBy("X")
result1 = result.constituentFor("A")
result2 = result.constituentFor("B")
result3 = result.constituentFor("C")