What is the purpose of the operator "*" in Qlik Sense?

The operator "*" in Qlik Sense is utilized to perform an intersection between two sets of data. When using this operator, it retrieves a set consisting of the records that belong to both operand sets. This capability is crucial for data analysis as it allows you to focus on the commonality shared between two distinct sets of data, which can lead to more refined insights.

For example, if one operand set represents customers who purchased Product A and another operand set represents customers who purchased Product B, using the "*" operator would yield a set of customers who purchased both products. This is particularly useful when an analyst needs to identify overlapping trends or behaviors among different categories within their datasets.

Rather than simply aggregating all data or filtering out non-matching records, using the intersection operator helps to pinpoint shared elements, enhancing the analytical process and improving decision-making based on that shared data.