What does changing Unique Values in the Access Property Sheet from No to Yes do before running a query?

Changing the Unique Values property in the Access Property Sheet from No to Yes modifies how the query handles duplicate records in the dataset. When it is set to Yes, the query is configured to return each distinct product only once, regardless of how many sales of that product have occurred. This is useful for summarizing data where you want to identify unique items without the influence of frequency or count.

By implementing this change, the resulting dataset will filter out duplicates, allowing for cleaner data analysis and reports that highlight unique entries rather than repeated instances of the same item. This is particularly beneficial in scenarios such as inventory management or sales analysis, where knowing the individual products is essential for further calculations and assessments.

Choosing this setting efficiently simplifies the data for users who need to focus on unique entries instead of getting overwhelmed with repeated information, which could lead to confusion or misinterpretation of the dataset's significance.