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If you set escape on, it uses an esape using the backslash. So, backslash ampersand will show you an ampersand. Hope this helps.
The ESCAPE clause identifies the backslash (\) as the escape character. In the pattern, the escape character precedes the underscore (_). This causes Oracle to interpret the underscore literally, rather than as a special pattern matching character.
Escape sequences are used within an SQL statement to tell the driver that the escaped part of the SQL string should be handled differently. When the JDBC driver processes the escaped part of an SQL string, it translates that part of the string into SQL code that SQL Server understands.
Instead of
node_name = 'Geometric Vectors \& Matrices'
use
node_name = 'Geometric Vectors ' || chr(38) || ' Matrices'
38 is the ascii code for ampersand, and in this form it will be interpreted as a string, nothing else. I tried it and it worked.
Another way could be using LIKE and an underline instead the '&' character:
node_name LIKE 'Geometric Vectors _ Matrices'
The chance that you'll find some other record too, which is different in only this one character, is quite low.
Escape is set to \ by default, so you don't need to set it; but if you do, don't wrap it in quotes.
Ampersand is the SQL*Plus substitution variable marker; but you can change it, or more usefully in your case turn it off completely, with:
set define off
Then you don't need to bother escaping the value at all.
You can use
set define off
Using this it won't prompt for the input
straight from oracle sql fundamentals book
SET DEFINE OFF
select 'Coda & Sid' from dual;
SET DEFINE ON
how would one escape it without setting define.
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