1. Simple program framework.
Three parts.
The first is data flow. The second is procedure. The third is art.
Among them, the data process includes functions. Data flow can only be reflected in functions.
The data process is quite troublesome, which will be discussed later.
For example, the simplest way to sell and buy products.
To implement this function.
Then you need to have a product basic table, a product detail table, a store table, and a backpack table. If the scalability is stronger, the corresponding double tables are indispensable.
The questions on the table are all simple. The key is what this item is used for. In this way, there is a lot of data about the source of the items, and a lot of data about the direction of the items.
Finally, the data must be wrapped in a circle.