CREATE TABLE table_name_64 (character VARCHAR2, duration VARCHAR2, soap_opera VARCHAR2)

What character was portrayed by the same actor for 12 years on Neighbours?
SELECT character FROM table_name_64 WHERE duration = "12 years" AND soap_opera = "neighbours"
SELECT "character" FROM "table_name_64" WHERE "12 years" = "duration" AND "neighbours" = "soap_opera"