DISTINCT query help

[datoshway]

I have three fields in my table.  I need one of those fields to be distinct.  How should I combine a SELECT DISTINCT and the regular queries?

 

[datoshway]

I should clarify a little.  Sorry guys. 

$sql = "Select distinct one,two,three from $DB_TBLName";

 

Thats pulling all the results.  What I need is to exclude the results that are duplicate.  So i'd  like to search the field "one" and make sure it is distinct.  If it is not distinct, i'd like to exclude the entire entry.

 

[The Little Guy]

$sql = "Select distinct(one), two, three from $DB_TBLName";

[datoshway]

Thanks!  I ended up using this query and it seems to work well. 

$sql = "Select one,two,three from $DB_TBLName GROUP BY one";