CREATE TABLE table_42 ("Scheme" CLOB, "Tariff code" CLOB, "BTs retail price  ( regulated ) " CLOB, "Approx premium" CLOB, "Prefixes" CLOB)

What is the premium associated with tariff code g9?
SELECT "Approx premium" FROM table_42 WHERE "Tariff code" = 'g9'
SELECT "Approx premium" FROM "table_42" WHERE "Tariff code" = 'g9'