CREATE TABLE table_28409 ("Institution" CLOB, "Location" CLOB, "Nickname" CLOB, "Founded" FLOAT, "Type" CLOB, "Enrollment" FLOAT, "Football?" CLOB, "Joined" FLOAT)

How many values for joined occur at Guilford College?
SELECT COUNT("Joined") FROM table_28409 WHERE "Institution" = 'Guilford College'
SELECT COUNT("Joined") FROM "table_28409" WHERE "Institution" = 'Guilford College'