The standard concatenate operator is supported for joining two character or byte expressions together, generating the SQL expression1 || expression2. Numeric or date expressions are converted to characters before concatenating. The resulting type can be BYTE as well as one of the character data types, depends on the type of the expressions. For more information, refer to the chapter titled Concatenation Operator, in the section titled Argument Types and Rules, found in the SQL Functions, Operators, Expressions and Predicates document, B035-1145. When dragging a Concatenate operator into a variable, the following tree element is created.
Columns and/or other expressions can be moved into the (empty) branches of the tree, where the first argument is to the left of the concatenation operator, the second to the right.
There are no special properties for the Concatenate operator.