database our_platform, table user_info: columns: name, acc_num, bank_info, citizen_id, reg_date, initial_capital,balance (PRIMARY KEY acc_num) table transactions: column: trans_date, trans_time, trans_id, trans_price, trans_amount, stock_code, seller_acc_num, buyer_acc_num (PRIMARY KEY trans_id) table price_track: stock_code, stock_name,time TIMESTAMP,price,amount,(this can be obtained from the transaction table) to illustrate security, can have an example where bank_info and citizen_id will not be shown can partition according to stock_code to study A股 B股 新股申购等等