Using automation tools like Integromat with Google Sheets, you can specify different actions depending on whether a data entry already exists. In the case of a database search that yields results, meaning the entry already exists, you can automate the tool to update the existing row. However, if the search comes up empty, indicating the entry does not yet exist, the tool can be programmed to create a new row. This differentiation is often set up using filters which check for the existence or absence of a specific identifier (like a row number) to trigger different automated responses.