CREATE TABLE table_203_148 (id NUMBER, "date" CLOB, "name" CLOB, "nationality" CLOB, "tonnage\ ( grt ) " NUMBER, "fate" CLOB)

which submarine had the most tonnage ?
SELECT "name" FROM table_203_148 ORDER BY "tonnage\n(grt)" DESC LIMIT 1
SELECT "name" FROM "table_203_148" ORDER BY "tonnage\n(grt)" DESC FETCH FIRST 1 ROWS ONLY