CREATE TABLE "table1_222666_1" (
  "former_country_name" text,
  "former_codes" text,
  "period_of_validity" text,
  "iso_3166_3_code" text,
  "new_country_names_and_codes" text
);

Question: Name the former codes for  merged into panama ( pa , pan , 591 )
SQL: SELECT "former_codes" FROM "table1_222666_1" WHERE "new_country_names_and_codes"='Merged into Panama ( PA , PAN , 591 )';

Question: Name the total number for period of validity for upper volta
SQL: SELECT COUNT("period_of_validity") FROM "table1_222666_1" WHERE "former_country_name"='Upper Volta';