CREATE TABLE "howick_local_board" (
  "name" text,
  "years" text,
  "area" text,
  "authority" text,
  "decile" real,
  "roll" real
);

Question: What is the total number on roll for Shelly Park school?
SQL: SELECT COUNT("roll") FROM "howick_local_board" WHERE "name"='shelly park school';