create database students_1905c;
INSERT INTO st_student (id, name, English, Python, C, Grade_num) VALUES (1, '1', 2, 2, 2, 6);
INSERT INTO st_student (id, name, English, Python, C, Grade_num) VALUES (2, '2', 2, 2, 2, 2);
INSERT INTO st_student (id, name, English, Python, C, Grade_num) VALUES (3, '3', 3, 3, 3, 9);
INSERT INTO st_student (id, name, English, Python, C, Grade_num) VALUES (4, '4', 4, 4, 4, 12);
INSERT INTO st_student (id, name, English, Python, C, Grade_num) VALUES (5, '5', 5, 5, 5, 15);
INSERT INTO st_student (id, name, English, Python, C, Grade_num) VALUES (6, '梨', 1, 1, 1, 3);
INSERT INTO st_student (id, name, English, Python, C, Grade_num) VALUES (7, '李宁', 2, 2, 2, 6);