Add users and grades display

db.go

@@ -148,6 +148,11 @@ CREATE TABLE IF NOT EXISTS student_corrected(
   FOREIGN KEY(id_user) REFERENCES users(id_user),
   FOREIGN KEY(id_template) REFERENCES correction_templates(id_template)
 ) DEFAULT CHARACTER SET = utf8 COLLATE = utf8_bin;
+`); err != nil {
+		return err
+	}
+	if _, err := db.Exec(`
+CREATE VIEW IF NOT EXISTS student_scores AS SELECT U.id_user, id_survey, Q.id_question, MAX(R.score) as score FROM survey_quests Q CROSS JOIN users U LEFT JOIN survey_responses R ON Q.id_question = R.id_question AND R.id_user = U.id_user GROUP BY Q.id_question, U.id_user;
 `); err != nil {
 		return err
 	}