What would you use the Previous function for in a script?

The Previous function is utilized in Qlik Sense scripting to access values from prior records in the data load process. This function allows for the evaluation of data from the preceding row or record in a dataset, which can be particularly useful for calculations that depend on historical data or sequences, such as cumulative totals, differences between rows, or creating running totals.

For instance, when calculating a running total or assessing trends over time, you often need to reference the value of the previous record to derive the current record's value. The Previous function simplifies this process, making it easier to create dynamic and responsive data transformations.

In contrast, options that suggest retrieving data from the first record, referencing values from the last record, or just obtaining values based on the current record do not align with what the Previous function is designed to do. The essence of the Previous function lies in its capacity to facilitate backward-looking calculations within a dataset.