REGEXP Function in DB2

In IBM DB2, you can use the REGEXP_LIKE function to perform regular expression matching. However, it's worth noting that DB2 doesn't support regular expressions directly like some other databases.

Here's an alternative approach using the REGEXP_LIKE function:

Suppose you have a table named products with a column product_name, and you want to find all products whose names start with "Apple":

SELECT product_name

FROM products

WHERE REGEXP_LIKE(product_name, '^Apple');

In this example:

- product_name is the column containing product names.

- The REGEXP_LIKE function is used to match product names using a regular expression pattern.

- '^Apple' is the regular expression pattern. The ^ asserts the start of the string, so it matches product names that start with "Apple".

This query will return all product names from the products table where the name starts with "Apple".

While DB2 doesn't have native support for regular expressions like some other databases, you can achieve similar functionality using functions like REGEXP_LIKE.