CREATE TABLE table_204_54 (id NUMBER, "pondicherry assembly" CLOB, "duration" CLOB, "name of m.l.a." CLOB, "party affiliation" CLOB, "election year" NUMBER)

how many assemblies have their been ?
SELECT COUNT(DISTINCT "pondicherry assembly") FROM table_204_54
SELECT COUNT(DISTINCT "pondicherry assembly") FROM "table_204_54"