drop table if exists grade; drop table if exists language; CREATE TABLE `grade` ( `id` int(4) NOT NULL, `language_id` int(4) NOT NULL, `score` int(4) NOT NULL, PRIMARY KEY (`id`)); CREATE TABLE `language` ( `id` int(4) NOT NULL, `name` varchar(32) NOT NULL, PRIMARY KEY (`id`)); INSERT INTO grade VALUES (1,1,12000), (2,1,13000), (3,2,11000), (4,2,10000), (5,3,11000), (6,1,11000), (7,2,11000); INSERT INTO language VALUES (1,'C++'), (2,'JAVA'), (3,'Python'); 2|C++|13000 1|C++|12000 3|JAVA|11000 7|JAVA|11000 4|JAVA|10000 5|Python|11000