suppose a bill comes with 3 items. in a denormalized form it will take 3 inserts in same table (one for each item). But it normalized, it will take 4 inserts, 1 in bills table, 3 in bill_items table.
how is this faster ? are there other factors to gain over the extra insert ?
Repeated data doesn't get reinserted
Обсуждают сегодня