CREATE TABLE table_2970978_1 (ave_attendance VARCHAR, ___ave_on_prev_season VARCHAR)

How many values of attendance occur when ave. on previous season is +645?
SELECT COUNT(ave_attendance) FROM table_2970978_1 WHERE ___ave_on_prev_season = "+645"
SELECT COUNT("ave_attendance") FROM "table_2970978_1" WHERE "+645" = "___ave_on_prev_season"