CREATE TABLE table_203_201 (id NUMBER, "class" CLOB, "type" CLOB, "ships" CLOB, "displacement" CLOB, "note" CLOB)

which class has the least displacement in tonnes ?
SELECT "class" FROM table_203_201 ORDER BY "displacement" LIMIT 1
SELECT "class" FROM "table_203_201" ORDER BY "displacement" FETCH FIRST 1 ROWS ONLY