CREATE TABLE table_203_559 (id NUMBER, "no." NUMBER, "name" CLOB, "took office" CLOB, "left office" CLOB, "president served under" CLOB, "notable for" CLOB)

how many commissioners served under calvin coolidge ?
SELECT COUNT("name") FROM table_203_559 WHERE "president served under" = 'calvin coolidge'
SELECT COUNT("name") FROM "table_203_559" WHERE "president served under" = 'calvin coolidge'