Ask the Expert

Changing a varchar2 field to uppercase

Please advise on changing data in a varchar2 column to all uppercase. It currently holds a mix of upper- and lowercase.

    Requires Free Membership to View

You can make the change to all current rows with a single update statement as follows:

UPDATE my_table
   SET my_column = UPPER(my_column) ;
You could then also "force" all future data entered into that column to be stored in upper case by creating a simple trigger as follows:
CREATE TRIGGER make_upper
BEFORE UPDATE OR INSERT ON my_table
FOR EACH ROW
begin
  :new.my_column := upper(:new.my_column) ;
end ;
/

For More Information

  • What do you think about this answer? E-mail the editors at editor@searchDatabase.com with your feedback.
  • The Best Oracle Web Links: tips, tutorials, scripts, and more.
  • Have an Oracle or SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
  • Ask your technical Oracle and SQL questions -- or help out your peers by answering them -- in our live discussion forums.
  • Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.

This was first published in May 2002

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: