CREATE TABLE table_name_79 (reign_began VARCHAR2, country VARCHAR2, reign_ended VARCHAR2)

Whose reign began in Vietnam and ended in October 1005?
SELECT reign_began FROM table_name_79 WHERE country = "vietnam" AND reign_ended = "october 1005"
SELECT "reign_began" FROM "table_name_79" WHERE "country" = "vietnam" AND "october 1005" = "reign_ended"