Changing a varchar2 field to uppercase

owercase.

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) ;

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.