CREATE TABLE table_204_354 (id NUMBER, "opus" CLOB, "title" CLOB, "genre" CLOB, "sub\\u00addivisions" CLOB, "libretto" CLOB, "composition" CLOB, "premiere date" CLOB, "place ,  theatre" CLOB)

which composition spanned a longer period from beginning of composition to premiere - elektra , or intermezzo ?
SELECT "title" FROM table_204_354 WHERE "title" IN ('elektra', 'intermezzo') ORDER BY "premiere date" - "composition" DESC LIMIT 1
SELECT "title" FROM "table_204_354" WHERE "title" IN ('elektra', 'intermezzo') ORDER BY "premiere date" - "composition" DESC FETCH FIRST 1 ROWS ONLY