Okla. Stat. tit. 26 § 11-112
If no candidate for the office of an associate district judge, or district judge, if the nominating district is coextensive with the entire judicial district or electoral division of a judicial district, receives a majority of the votes cast for that office at the Primary Election, the two candidates who receive the highest number of votes will have their names placed on the ballot for the General Election. In the case of district judges, if the nominating district is not coextensive with the whole judicial district or electoral division of a judicial district, the two candidates who receive the highest number of votes at the Primary Election will have their names placed on the ballot for the General Election, whether or not one receives a majority of votes cast for that office at the Primary Election.
Okla. Stat. tit. 26, § 11-112