What is the result of a Left Join in Qlik Sense?

In Qlik Sense, a Left Join combines all rows from the first table with matching rows from the second table. When performing a Left Join, every record from the first table is retained, and for each of these records, any corresponding matches from the second table are included. If there are no matches found in the second table for a particular row in the first table, then that row will still appear in the result set with nulls for the columns from the second table.

This behavior allows users to ensure that they maintain complete information from the first dataset, while still incorporating relevant information from the second dataset where applicable. Leveraging Left Joins is essential when you're interested in preserving the entirety of one dataset while enriching it with data from another source.

This is distinct from other types of joins in which either all rows from the second table are included or where only matched records from both tables are returned. Such differences highlight the unique role of the Left Join in data exploration and reporting within Qlik Sense.