IIF Expressions in Informatica Power Center

Nested IF Expressions can be complex to write in Informatica using IIF. A simpler way to write nested IF is to use the decode function.
For example, if you need to write something like

IF ( A > B ) THEN 1
ELSE IF ( C > D ) THEN 2
ELSE IF ( E > F ) THEN 3
ELSE 4

can be written as

DECODE(TRUE,A>B,1,
C>D,2,
E>F,3,
4)
Is that helpful???