Data room charging system-table

It is really a headache to mention the table of the data center charging system. Because you must create a table by yourself.

When I started out, I only thought about the table for a day-creating several tables and starting from that table, will the table information be incomplete? Will it be difficult to change it if it is not complete ......

After a while, I sat down with my head.

My plan is to do it step by step, which table is needed and which table is created. After completing the first module, I felt that it was not as difficult as I thought. After the first table is created, the next requirement is generated. Naturally, the next table is created.

The following figure shows the table I created. Although the table can be implemented, I know that there will certainly be something unscientific.

I have created 10 tables. Each table is created based on requirements. Although functions can be implemented, sometimes I feel that one or another is unscientific. After all, this is the first time. Oh, forgive yourself. You must plan the tables to be created later.