How to get specific attribute from DB

a:3:{i:0;a:2:{s:21:”wwsd_percent_discount”;s:2:”10″;s:25:”wwsd_minimum_discount_qrt”;s:2:”20″;}i:1;a:2:{s:21:”wwsd_percent_discount”;s:2:”20″;s:25:”wwsd_minimum_discount_qrt”;s:2:”50″;}i:2;a:2:{s:21:”wwsd_percent_discount”;s:2:”30″;s:25:”wwsd_minimum_discount_qrt”;s:3:”100″;}} I want to get 10, 20, 30 from wwsd_percent_discount. I wrote this code: $ getId = $ product->get_id(); global $ wpdb; $ result = $ wpdb->get_results(“SELECT meta_value FROM $…