Set result in ascending order

Hallo,

I have the following formula which works fine. However, when I select ALL the records are not sorted in ascending order as per the drop down list (i.e., ?Practice). Is there a way I can display the records in alphabetic ascending order?

Thanks

Code:

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(if {?Practice} = "ALL" then TRUE
    else {GP27.PRACTICE} = {?Practice})

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