Use the desc() function to generate a new ColumnExpression which sorts the actual expression in descending order.
- This function is supported only while sorting data.
- This function is neither supported in projection nor supported in filtering data.
Example
>>> from teradataml import load_example_data
>>> load_example_data("dataframe","sales")
>>> df = DataFrame.from_table('sales')
>>> df.csum(sort_columns=[df.accounts, df.Feb.desc()], drop_columns=True)
csum_Feb csum_Jan csum_Mar csum_Apr 0 500.0 400 450 531 1 910.0 550 590 781 2 1000.0 550 590 781 3 710.0 400 450 781 4 300.0 250 310 351 5 210.0 200 215 250