3-3. Evaluating Multiple Mutually Exclusive Conditions
Problem
Your application has multiple conditions to evaluate, and each of them is mutually exclusive. If one of the conditions evaluates to FALSE, you'd like to evaluate the next one. You want that process to continue until there are no more conditions.
Two solutions are possible: one using IF and the other using CASE.
Solution #1
Use an IF-ELSIF-ELSE statement to perform an evaluation of all mutually exclusive conditions. The following example is a SQL*Plus script that queries how many countries are in a specified region.
Note The following example uses SQL*Plus substitution variables. Be ...
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