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06.05.2008 at 09:42AM PDT, ID: 23460946
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7.8

First_Value Oracle Function Column Name

Asked by claghorn in PL / SQL, Oracle Database, Oracle 9.x

The following query works great when the bottom of the stack contains a non null value. It shows me all rows of the stack that do not match it. But when the bottom element of the Stack is null it does not work. How do I make it use null as the basis with which to compare all other rows of the stack with?

SELECT   stack, pos, flavor, first_flavor
    FROM (SELECT stack, pos, flavor,
                 FIRST_VALUE(flavor) OVER(PARTITION BY stack ORDER BY NVL2
                                                        (flavor,
                                                         pos,
                                                         NULL
                                                        ) ASC NULLS LAST)
                                                                 first_flavor
            FROM stackofflavors)
   WHERE flavor != first_flavor
ORDER BY stack, posStart Free Trial
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About this solution

Zones: PL / SQL, Oracle Database, Oracle 9.x
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Solution Provided By: sdstuber
Participating Experts: 1
Solution Grade: A
 
 
 
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