In Qlik Sense, when the numbers of columns in two tables are same and the naming of those columns are same, Qlik Sense, by default, concatenates those tables without any explicit command. This is called the automatic concatenation.

For example, you may get the customer information from two different sources, but with the same columns names. In such a case, automatic concatenation will be done by Qlik, as is shown in the following screenshot:

You can see in the preceding screenshot that both the Source1 and Source2 tables have two columns and the names of both the columns are the same (note that names in Qlik Sense are case-sensitive). Thus, they are auto concatenated. One more thing to note here is that, in such a situation, Qlik Sense ignores the name given to the second table and stores all the data under the name given to the first table.

The output table after concatenation is shown in the following screenshot: