Performs a string operation that concatenates two or more character strings, tuples, or a combination of strings and tuples.
A valid Multidimensional Expressions (MDX) expression that returns a string value.
A value with the data type of the parameter that has the higher precedence.
Both expressions must be of the same data type, or one expression must be able to be implicitly converted to the data type of the other expression. If one expression evaluates to a null value, the operator returns the result of the other expression.