weight_class_from_id int(11) not_null comment(FK to weight_classes table - source weight class for conversion)
weight_class_to_id int(11) not_null comment(FK to weight_classes table - target weight class for conversion)
weight_class_rule decimal(15,4) not_null comment(Conversion multiplier - e.g. 1 kg = 2.2046 lb, so rule would be 2.2046)
--
primary weight_class_from_id weight_class_to_id
idx_weight_class_from_id weight_class_from_id
idx_weight_class_to_id weight_class_to_id
##
engine innodb
character_set utf8mb4
collate utf8mb4_unicode_ci
