CREATE TABLE table_37599 ("Rank" FLOAT, "Airport" TEXT, "Code  ( IATA/ICAO ) " TEXT, "Total Cargo  ( Metric Tonnes ) " FLOAT, "% Change" TEXT)

What's the highest rank of a PVG/ZSPD Code (IATA/ICAO) airport with a total cargo less than 2,543,394 metric tonnes?
SELECT MAX("Rank") FROM table_37599 WHERE "Code (IATA/ICAO)" = 'pvg/zspd' AND "Total Cargo (Metric Tonnes)" < '2,543,394'
SELECT MAX("Rank") FROM "table_37599" WHERE "Code (IATA/ICAO)" = 'pvg/zspd' AND "Total Cargo (Metric Tonnes)" < '2,543,394'