text: create table skills
  (
      id smallserial not null
          constraint skills_pk
              primary key,
      name_en varchar(50) not null,
      name_ru varchar(50) not null
  );
  
  create unique index skills_name_en_uindex
      on skills (name_en);
  
  create unique index skills_name_ru_uindex
      on skills (name_ru);
  