CREATE TABLE table_3905 ("Standard" CLOB, "Date" CLOB, "CO  ( g/kWh ) " CLOB, "NO x  ( g/kWh ) " CLOB, "HC  ( g/kWh ) " CLOB, "PM  ( g/kWh ) " CLOB)

What's the NO of the standard with HC of 1.23 g/kWh?
SELECT "NO x (g/kWh)" FROM table_3905 WHERE "HC (g/kWh)" = '1.23'
SELECT "NO x (g/kWh)" FROM "table_3905" WHERE "HC (g/kWh)" = '1.23'