CREATE TABLE table_203_313 (id NUMBER, "name" CLOB, "pennant" CLOB, "builder" CLOB, "launched" CLOB, "original name" CLOB, "fate" CLOB)

what was the next wave class oiler after wave emperor ?
SELECT "name" FROM table_203_313 WHERE "launched" > (SELECT "launched" FROM table_203_313 WHERE "name" = 'wave emperor') ORDER BY "launched" LIMIT 1
SELECT "name" FROM "table_203_313" WHERE "launched" > (SELECT "launched" FROM "table_203_313" WHERE "name" = 'wave emperor') ORDER BY "launched" FETCH FIRST 1 ROWS ONLY