1. 程式人生 > >Oracle 字元匹配

Oracle 字元匹配

百分號 0個或多個字元

下劃線 匹配單個任意字元

 ESCAPE Clause Example

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.