CREATE TABLE table_204_115 (id NUMBER, "year" NUMBER, "track" CLOB, "number" NUMBER, "team" CLOB, "car" CLOB, "round result" CLOB)

what was the number of the car greg murphy competed with in the 2012 hamilton street circuit ?
SELECT "number" FROM table_204_115 WHERE "year" = 2012 AND "track" = 'hamilton street circuit'
SELECT "number" FROM "table_204_115" WHERE "track" = 'hamilton street circuit' AND "year" = 2012