Leetcode力扣 MySQL数据库 1393 股票的资本损益

1393 股票的资本损益

SQL架构

Create Table If Not Exists Stocks_1393 (stock_name varchar(15), operation ENUM('Sell', 'Buy'), operation_day int, price int);
Truncate table Stocks_1393;
insert into Stocks_1393 (stock_name, operation, operation_day, price) values ('Leetcode', 'Buy', '1', '1000');
insert into Stocks_1393 (stock_name, operation, operation_day, price) values ('Corona Masks', 'Buy', '2', '10');
insert into Stocks_1393 (stock_name, operation, operation_day, price) values ('Leetcode', 'Sell', '5', '9000');
insert into Stocks_1393 (stock_name, operation, operation_day, price) values ('Handbags', 'Buy', '17', '30000');
insert into Stocks_1393 (stock_name, operation, operation_day, price) values ('Corona Masks', 'Sell', '3', '1010');
insert into Stocks_1393 (stock_name, operation, operation_day, price) values ('Corona Masks', 'Buy', '4', '1000');
insert into Stocks_1393 (stock_name, operation, operation_day, price) values ('Corona Masks', '