Use with NO CASE.
The NO CASE OR UNKNOWN condition evaluates to TRUE if every conditional_expression in the list evaluates to FALSE, or if a conditional_expression evaluates to UNKNOWN and all prior conditions in the list evaluate to FALSE.
Use with NO CASE.
The NO CASE OR UNKNOWN condition evaluates to TRUE if every conditional_expression in the list evaluates to FALSE, or if a conditional_expression evaluates to UNKNOWN and all prior conditions in the list evaluate to FALSE.