具有相似列/属性的设计表

Question

I have 2 forms, let's say a product_with_refund_form and product_without_refund_form. In table 1 I have these fields:

• name
• transaction_number
• status
• amount
• cashier

In the 2nd table I have:

• name
• amount
• po_number

My question is, how do you design the table? Do I create each table for both of them or create 1 table with all similar fields, another table for product_with_refund_form that has fields unique to it then another table for product_without_refund_form.

Answer 1

Instead of trying to work with two similar tables, why not combine the two into a single table.

Note:

• The Primary Key "ID" was added to uniquely identify each row with its Auto-Incremented value.
• "isRefund" is used as a flag to tell the difference between the two forms. This value could be any single character eg "y" or "n".
• Since the requirements do not mention an external "cashier" table, I kept this column a varchar field.

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Product_Transactions - Field Names

id, name, transaction_number, status, amount, cashier, DateCreated, po_number, isRefund

Table Creation Code

CREATE TABLE Product_Transactions (`id` int AUTO_INCREMENT, `name` varchar(100), `status` varchar(10), 'amount' DECIMAL(10,2), 'cashier' varchar(100), 'DateCreated' TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, 'po_number' varchar(100), 'isRefund' varchar(1), PRIMARY KEY (id))
;