Tag: ora 01403

PL / SQL块问题：找不到数据

SET SERVEROUTPUT ON DECLARE v_student_id NUMBER := &sv_student_id; v_section_id NUMBER := 89; v_final_grade NUMBER; v_letter_grade CHAR(1); BEGIN SELECT final_grade INTO v_final_grade FROM enrollment WHERE student_id = v_student_id AND section_id = v_section_id; CASE — outer CASE WHEN v_final_grade IS NULL THEN DBMS_OUTPUT.PUT_LINE ('There is no final grade.'); ELSE CASE — inner CASE WHEN v_final_grade >= 90 […]