CREATE TABLE table_203_839 (id NUMBER, "station" CLOB, "type" CLOB, "latitude" CLOB, "longitude" CLOB, "el.  ( m ) " NUMBER, "opened" NUMBER, "closed" NUMBER, "coordinates" CLOB)

what was the very first station to open ?
SELECT "station" FROM table_203_839 ORDER BY "opened" LIMIT 1
SELECT "station" FROM "table_203_839" ORDER BY "opened" FETCH FIRST 1 ROWS ONLY