Based on your description, you need at least three tables to begin with, e.g.
Table: bill
bill_id (primary key)
bill_table_no
bill_datetime
etc
Table: product
product_id (primary key)
product_price
etc
Table: bill_product (both bill_id and product_id are composite primary key)
bill_id (foreign key to bill table)
product_id (foreign key to product table)
qty
etc
Learn more
Introduction to database design[
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