updating speacial characters into database

I have string with many & and | operators . If I try to update such a string into database it asks me for a value . For e.g if i try to update a string A&B oracle asks me for a value . I want to st开发者_JS百科ore the string as A&B

If you have this problem using SQL*Plus as a client, you should first give this command:

set define off

With set define you can also change the substitution character (&).

You can also define an escape character and use it, for example:

SET ESCAPE '\'

SELECT 'A\&B' FROM companies;