cumulativeSum() function
cumulativeSum() computes a running sum for non-null records in a table.
The output table schema will be the same as the input table.
Function type signature
(<-tables: stream[A], ?columns: [string]) => stream[B] where A: Record, B: RecordFor more information, see Function type signatures.
Parameters
columns
List of columns to operate on. Default is ["_value"].
tables
Input data. Default is piped-forward data (<-).
Examples
Return the running total of values in each table
import "sampledata"
sampledata.int()
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