If your data is spread across two attribute fields, and you want to join them together in order to create a single label, you will need to create a new field that joins them together. In order to do this, open the Edit Attribute Schema dialog and add a new field. Once the new field is added, with the name, type, and length set accordingly, you will need to add an expression that adds the two fields together.
The formula for adding two string fields together is as follows:
(column1)& " " &(column2)
In this formula, the '&' operator is specifically used for concatenating strings. Also,m be sure to include the " " as it will include a space between the two strings being joined.