[JIRA] Created: (DSY-662) Query language: min and max functions

Query language: min and max functions
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         Key: DSY-662
         URL: http://issues.cocoondev.org//browse/DSY-662
     Project: Daisy
        Type: Improvement
 Reporter: Karel Vervaeke
    Priority: Minor


Functions that return the extrema of a list of values, e.g:

select min($FieldOne, $FieldTwo)

null values should be treated as the absolute minimum (?)

Note that this is not related to the mysql min function.  The same could be implemented in mysql (for one record) as:

select min(foo) from (select value1 foo union select value2 foo) dummy

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