[ALTER TABLE products_discount_quantity ADD discount_price_w VARCHAR( 150 ) DEFAULT '0' AFTER discount_price_w;]
when doing your sql patch
Change:
ALTER TABLE products_discount_quantity ADD discount_price_w VARCHAR( 150 ) DEFAULT '0' AFTER discount_price_w;
to:
ALTER TABLE products_discount_quantity ADD discount_price_w VARCHAR( 150 ) DEFAULT '0' AFTER discount_price;
Cheers