id int not_null auto_increment
customers_id int(11) not_null
products_id int(11) not_null
score float DEFAULT NULL
recommendation_date date DEFAULT NULL
product_tag VARCHAR(255) DEFAULT NULL
customers_group_id int(11) DEFAULT(0) not_null
status int(1) not_null default(1)
--
primary id
idx_products_id products_id
idx_customers_id customers_id
idx_score score
idx_customers_group_id customers_group_id
idx_recommendation_date recommendation_date

##
engine innodb
character_set utf8mb4
collate utf8mb4_unicode_ci