CREATE TABLE table_12226390_3 (production_code INT, written_by VARCHAR)

what's the minimum production code written by jay sommers & dick chevillat and al schwartz
SELECT MIN(production_code) FROM table_12226390_3 WHERE written_by = "Jay Sommers & Dick Chevillat and Al Schwartz"
SELECT MIN("production_code") FROM "table_12226390_3" WHERE "Jay Sommers & Dick Chevillat and Al Schwartz" = "written_by"