I'm trying to concatenate columns, but it's not working. how do i concatenate in sql?

Example:

-- Incorrect concatenation attempt
SELECT first_name + ' ' + last_name AS full_name FROM employees;

Solution:

-- Correct concatenation using CONCAT function
SELECT CONCAT(first_name, ' ', last_name) AS full_name FROM employees;

In many SQL databases, you can use the CONCAT function to concatenate multiple strings together. Ensure you're using the right syntax for your specific database.