Skip to Main Content
Oracle PL/SQL Programming: A Developer's Workbook
book

Oracle PL/SQL Programming: A Developer's Workbook

by Steven Feuerstein, Andrew Odewahn
May 2000
Intermediate to advanced content levelIntermediate to advanced
594 pages
11h 32m
English
O'Reilly Media, Inc.
Content preview from Oracle PL/SQL Programming: A Developer's Workbook

Intermediate

20-11.

Write a function that returns TRUE if a number is odd.

20-12.

Which function returns the error message associated with a particular Oracle error number?

  1. GET_ERROR_MESSAGE

  2. ORA_MSG

  3. ORA_ERROR

  4. SQLERRM

  5. SQLCODE

20-13.

Write an exception section to display the current error code and its associated error message.

20-14.

Provide the format mask that prints the date “21-MAY-94” in the following formats:

Desired Date

Required Format

May 21, 1994

 

05/21/94

 

The 21st of May, 1994

 

Quarter 2

 

Week 21

 

Week 3 in Month 05

 

The 3rd week in May

 

20-15.

Suppose you need to add a new value to the “end” of your PL/SQL or index-by table. In other words, if the last row used is 10, you want to put your next value in row 11. Here is one way to do it:

IF names_list.LAST IS NULL
THEN
   names_list( 1) := next_name;
ELSE
   names_list (names_list.LAST + 1) := next_name;
END IF;

Rewrite the code so that you can do the assignment in a single line.

20-16.

Write a function that returns TRUE if the specified string is a valid number, FALSE if it is not. In other words, “123” and “–1e15” are valid numbers, while “123abc” is not.

20-17.

What is the output of this program?

DECLARE
   v_number NUMBER (10) := ABS (-99);
BEGIN
   IF v_number > -1
   THEN
      DBMS_OUTPUT.put_line ('It''s positive');
   ELSE
      DBMS_OUTPUT.put_line ('It''s negative');
   END IF;
END;

20-18.

What condition must be added to this code so it displays only every third row?

DECLARE CURSOR curs_get_numbers IS SELECT * FROM a_bunch_of_numbers; BEGIN FOR v_number_rec IN curs_get_numbers ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Oracle Database 12c PL/SQL Programming

Oracle Database 12c PL/SQL Programming

Michael McLaughlin
Oracle PL/SQL for DBAs

Oracle PL/SQL for DBAs

Arup Nanda, Steven Feuerstein
Oracle PL/SQL For Dummies

Oracle PL/SQL For Dummies

Michael Rosenblum, Paul Dorsey

Publisher Resources

ISBN: 9781449324070Supplemental ContentErrata Page