既存のテーブル
name regno subject_code grade result
abc 1000 cs105 C pass
abc 1000 it100 D pass
abc 1000 cs117 B pass
xyz 1001 cs105 E pass
xyz 1001 it100 A pass
xyz 1001 cs117 U fail
提案表
name regno subect_code1 grade subjectcode2 grade subjectcode3 grade result
abc 1000 cs105 C it100 D cs117 B pass
xyz 1001 cs105 E it100 A cs117 U fail