SQL CONCAT Function Explained: Usage & Examples

The CONCAT function in SQL is used to join multiple string values together to create a longer string. It can accept any number of string parameters and joins them in order. These parameters can be column names, constant values, or expressions. For example, in the following example:

SELECT CONCAT('Hello ', 'World') AS greeting;

The return result will be: Hello World

You can also combine column names with constant values, as shown below:

SELECT CONCAT(first_name, ' ', last_name) AS full_name FROM users;

This will concatenate the values in the first_name and last_name columns into full_name. The CONCAT function is useful for creating dynamically generated text fields or combining query conditions.