DAX includes a set of text functions based on the library of string. Text functions work with tables and columns.
DAX Text functions help us to return a part of a string, you can search & find for text within a string, concatenate string values and can perform many more operations.
Microsoft Power BI DAX provides various types of Text Functions such as:
UPPER
LOWER
LEFT
RIGHT
CONCATENATE
CONCATENATEX
LEN
SUBSTITUTE