CREATE TABLE table_203_758 (id NUMBER, "no." NUMBER, "dub no." NUMBER, "english dubbed title / english subbed title\ original japanese title" CLOB, "original air date" CLOB, "english air date" CLOB)

episodes have been dubbed ?
SELECT COUNT(DISTINCT "dub no.") FROM table_203_758
SELECT COUNT(DISTINCT "dub no.") FROM "table_203_758"