How to prevent LOV from displaying duplicates

Hi all. I'm using JDev 10.1.3. I have a af:selectOneChoice component which is used to set search criteria. There are a few records with duplicate values. Is there a way for me to prevent the LOV from displaying duplicate values? thanks in advance.
<af:selectOneChoice
     value="#{bindings.UserAckAnnualBalancesView1EdcDescription.inputValue}"
        label="EDC Description"
        valueChangeListener="#{backingExecuteBtn.alterEdcDescSearchVal}">
        <f:selectItems value="#{bindings.UserAckAnnualBalancesView1EdcDescription.items}"/>
</af:selectOneChoice>

John. I assume that you are suggesting that I do a SELECT DISTINCT. If so, then no I cannot change the underlying query. I want all the records, what I am actually looking for is a way to filter the items in the LOV.

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