Oracle中like查询下划线等特殊字符的处理

You can include the actual characters "%" or "_" in the pattern by using the

ESCAPE

clause, which identifies the escape character. If the escape character appears in the pattern before the character "%" or "_" then Oracle interprets this character
literally in the pattern, rather than as a special pattern matching character.

To search for employees with the pattern 'A_B' in their name:

SELECT last_name


FROM employees


WHERE last_name LIKE '%A\_B%' ESCAPE '\';

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.