CREATE TABLE table_204_832 (id NUMBER, "name" CLOB, "nationality" CLOB, "club" CLOB, "from" NUMBER, "until" CLOB)

how long did colin clarke coach the puerto rico islanders for ?
SELECT "until" - "from" FROM table_204_832 WHERE "name" = 'colin clarke' AND "club" = 'puerto rico islanders'
SELECT "until" - "from" FROM "table_204_832" WHERE "club" = 'puerto rico islanders' AND "name" = 'colin clarke'