CREATE TABLE table_17726 ("Ship" CLOB, "Builder" CLOB, "Namesake" CLOB, "Renamed" CLOB, "Laid down" FLOAT, "Launched" CLOB, "Commissioned or completed ( * ) " CLOB)

When was the ship launched when the commissioned or completed(*) is 6 june 1864?
SELECT "Launched" FROM table_17726 WHERE "Commissioned or completed(*)" = '6 June 1864'
SELECT "Launched" FROM "table_17726" WHERE "Commissioned or completed(*)" = '6 June 1864'