Which function is best for combining text strings in Tableau?

The plus sign (+) is the best function for combining text strings in Tableau because it directly allows for the concatenation of strings in calculated fields. When using the plus sign, you can simply place the text strings you want to combine on either side of the operator, and Tableau effectively merges them into a single string.

This method is straightforward and intuitive for users familiar with basic programming or spreadsheet environments, making it a commonly used approach for concatenating text. It also allows for easy readability in the code, as it operates similarly to arithmetic addition.

Other options may seem relevant, but they do not fit as seamlessly into Tableau's framework for text concatenation. For instance, although the CONCATENATE function is often utilized in other contexts or systems, it is not specifically the primary method recommended within Tableau for combining strings. Similarly, STRJOIN is specific to joining strings from an array with specified delimiters, which may not be the intended outcome when simply looking to combine two or more text strings. Lastly, the JOIN function is generally used for combining tables of data rather than directly concatenating individual text fields.