Calculates the sum of the values in the given column of the given dataset, or the sum for a series of numbers specified as arguments. When looking up the sum in a dataset, the column may be specified as an index or as a column name. Any null values in the column are ignored. If there are no rows in the dataset, zero is returned.
DataSet dataset - The dataset to use.
int columnIndex - The index of the column to use. Must be a column index of the provided dataset.
int/float - The sum of the values in that column.
|For example, suppose you had a table with this dataset in it.|