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why is there no product aggregate function in sql


why is there no product aggregate function in sql  using -'sql,oracle,aggregate-functions'

When there are Sum(), min(), max(), avg(), count() functions, can someone help understand why there is no product() built-in function. And what will be the most efficient user-implementation of this aggregate function ?

Thanks,
Trinity
    

asked Sep 15, 2015 by VetWills
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