CREATE TABLE table_23954 ("Position" FLOAT, "Race number" CLOB, "Sail number" CLOB, "Yacht" CLOB, "State/country" CLOB, "Yacht type" CLOB, "LOA  ( Metres ) " CLOB, "Skipper" CLOB, "Elapsed time d:hh:mm:ss" CLOB)

How many LOA (metres) reported for Black Jack?
SELECT COUNT("LOA (Metres)") FROM table_23954 WHERE "Yacht" = 'Black Jack'
SELECT COUNT("LOA (Metres)") FROM "table_23954" WHERE "Yacht" = 'Black Jack'