How does the First prefix function in data loading?

The First prefix function in data loading is used to limit the number of records that are loaded from a data source to a specified maximum. When you encounter this function in a load script, it allows you to define how many records to retrieve, which can be particularly useful when dealing with large datasets where you may only need a sample or specific number of records for analysis or testing.

By utilizing the First prefix, you can implement strategies to enhance performance, optimize memory usage, and focus on relevant data when it's impractical or unnecessary to load the entire dataset.