CREATE TABLE table_51579 ("Club" CLOB, "Leagues" CLOB, "Venue" CLOB, "Location" CLOB, "Capacity" FLOAT, "Established" FLOAT)

What is the capacity for b national - basketball?
SELECT COUNT("Capacity") FROM table_51579 WHERE "Leagues" = 'b national - basketball'
SELECT COUNT("Capacity") FROM "table_51579" WHERE "Leagues" = 'b national - basketball'