STRNCAT
Use the @STRNCAT function to concatenate one or more strings to a maximum length.
                  
Syntax
result = @STRNCAT (string,max_length[,string,max_length, ...])
Example
The following concatenates two strings and results in "ABC123."
                  
PHONE_NO = @STRNCAT ("ABCDEF", 3, "123", 3)