Parameter Markers

Parameter markers or bind variables are most commonly used in predicates, however some database platforms allow them in the SELECT list. However, since this is not supported across all platforms, you should not code your SQL to use bind variables in a SELECT list.

In addition, do not have bind variables as the operands of the same operator. This is not supported on all platforms. DB2/400 and DB2/OS390 cannot handle this type of operation.