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Immediate If. An database function, provided on many (but not all) database systems that returns one of two values depending on a supplied condition. It takes the form:


The expression returns the "true-result" if the "condition" evaluates to true, if the condition evaluates to "false" then the "false-result" is returned. For example:

select hour, iif(hour>=12,"pm","am") from log

will return a result set with the hour and an "am" or "pm" indicator (assuming that table log contains a field "hour" containing the hour of some event).