October 2002
Intermediate to advanced
688 pages
14h 14m
English
Content preview from Oracle® PL/SQL® Interactive Workbook, Second Edition
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Chapter 11 Exceptions: Advanced Concepts
| 1) | Create the following script. Modify the script created in this section in Chapter 10 (Question 1 of the Test Your Thinking section). Raise a user-defined exception with the RAISE_APPLICATION_ERROR statement. Otherwise, display how many students there are in a section. Make sure your program is able to process all sections. |
| A1: |
Answer: Recall the script created in
Chapter 10:
SET SERVEROUTPUT ON SIZE 5000 DECLARE CURSOR section_cur IS SELECT section_id FROM section; v_total NUMBER; e_too_many_students EXCEPTION; BEGIN FOR section_rec in section_cur LOOP BEGIN -- calculate number of students enrolled SELECT COUNT(*) INTO v_total FROM enrollment WHERE section_id = section_rec.section_id; IF v_total >= ... |
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