Table schema:
CREATE TABLE table_name_90 (pl_gp VARCHAR, pick__number VARCHAR, reg_gp VARCHAR, rd__number VARCHAR)

Question: What is the sum number of Pl GP when the Reg GP was 0, the Rd number was bigger than 8, and the pick number was bigger than 146?
SQL: SELECT COUNT(pl_gp) FROM table_name_90 WHERE reg_gp = 0 AND rd__number > 8 AND pick__number > 146