How does the RecNo function operate?

The RecNo function in Qlik Sense returns the current row number of the data being processed in a table. When using this function in the context of a load statement or within a data model, it generates a sequential number for each row that is associated with the current data load. This means that each row will have a unique identifier based solely on its position in that specific data set, which is helpful when you want to reference or manipulate specific rows based on their order.

For example, if you want to assign a unique identifier to each record in a loaded dataset, the RecNo function can be used to accomplish this. It becomes particularly useful in data transformation scenarios where the order of records matters or when you need to maintain a reference to the original ordering of data.

The other options, while they touch upon aspects of data manipulation, do not accurately describe the functionality of the RecNo function. Counting unique records, generating arrays, or locating the first record each represent different operations that are not relevant to the specific role and output of the RecNo function.